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83007431 = 136385187
BaseRepresentation
bin1001111001010…
…01011111000111
312210012012210022
410330221133013
5132222214211
612123045355
72025360113
oct474513707
9183165708
1083007431
1142945791
122397085b
1314274230
14b04a743
157449bdb
hex4f297c7

83007431 has 4 divisors (see below), whose sum is σ = 89392632. Its totient is φ = 76622232.

The previous prime is 83007383. The next prime is 83007451. The reversal of 83007431 is 13470038.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13470038 = 26735019.

It is a cyclic number.

It is not a de Polignac number, because 83007431 - 214 = 82991047 is a prime.

It is a super-2 number, since 2×830074312 = 13780467202439522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83007431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83007451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3192581 + ... + 3192606.

It is an arithmetic number, because the mean of its divisors is an integer number (22348158).

Almost surely, 283007431 is an apocalyptic number.

83007431 is a deficient number, since it is larger than the sum of its proper divisors (6385201).

83007431 is a wasteful number, since it uses less digits than its factorization.

83007431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6385200.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 83007431 is about 9110.8413991245. The cubic root of 83007431 is about 436.2200846474.

Adding to 83007431 its reverse (13470038), we get a palindrome (96477469).

It can be divided in two parts, 83007 and 431, that added together give a palindrome (83438).

The spelling of 83007431 in words is "eighty-three million, seven thousand, four hundred thirty-one".

Divisors: 1 13 6385187 83007431