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83027909 = 379219071
BaseRepresentation
bin1001111001011…
…10011111000101
312210020020212202
410330232133011
5132223343114
612123324245
72025503606
oct474563705
9183206782
1083027909
114295a108
1223980685
1314280653
14b053dad
157450cde
hex4f2e7c5

83027909 has 4 divisors (see below), whose sum is σ = 83247360. Its totient is φ = 82808460.

The previous prime is 83027887. The next prime is 83027921. The reversal of 83027909 is 90972038.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83027909 - 220 = 81979333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83027209) 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, 109157 + ... + 109914.

It is an arithmetic number, because the mean of its divisors is an integer number (20811840).

Almost surely, 283027909 is an apocalyptic number.

It is an amenable number.

83027909 is a deficient number, since it is larger than the sum of its proper divisors (219451).

83027909 is a wasteful number, since it uses less digits than its factorization.

83027909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219450.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 83027909 is about 9111.9651557718. The cubic root of 83027909 is about 436.2559536466.

The spelling of 83027909 in words is "eighty-three million, twenty-seven thousand, nine hundred nine".

Divisors: 1 379 219071 83027909