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88723081 = 130767883
BaseRepresentation
bin1010100100111…
…00111010001001
320011221121012001
411102130322021
5140203114311
612445351001
72125063606
oct522347211
9204847161
1088723081
1146099a67
1225868461
13154c5985
14bad76ad
157bc84c1
hex549ce89

88723081 has 4 divisors (see below), whose sum is σ = 88792272. Its totient is φ = 88653892.

The previous prime is 88723039. The next prime is 88723133. The reversal of 88723081 is 18032788.

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 88723081 - 211 = 88721033 is a prime.

It is a super-2 number, since 2×887230812 = 15743570204265122, 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 88723081.

It is not an unprimeable number, because it can be changed into a prime (88723021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32635 + ... + 35248.

It is an arithmetic number, because the mean of its divisors is an integer number (22198068).

Almost surely, 288723081 is an apocalyptic number.

It is an amenable number.

88723081 is a deficient number, since it is larger than the sum of its proper divisors (69191).

88723081 is a wasteful number, since it uses less digits than its factorization.

88723081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69190.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 88723081 is about 9419.2930201794. The cubic root of 88723081 is about 446.0109675090.

The spelling of 88723081 in words is "eighty-eight million, seven hundred twenty-three thousand, eighty-one".

Divisors: 1 1307 67883 88723081