89579729 has 4 divisors (see below), whose sum is σ = 89641380. Its totient is φ = 89518080.

The previous prime is 89579717. The next prime is 89579731. The reversal of 89579729 is 92797598.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57032704 + 32547025 = 7552^2 + 5705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89579729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89579029) 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, 28592 + ... + 31569.

It is an arithmetic number, because the mean of its divisors is an integer number (22410345).

Almost surely, 2^89579729 is an apocalyptic number.

It is an amenable number.

89579729 is a deficient number, since it is larger than the sum of its proper divisors (61651).

89579729 is a wasteful number, since it uses less digits than its factorization.

89579729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61650.

The product of its digits is 2857680, while the sum is 56.

The square root of 89579729 is about 9464.6568347722. The cubic root of 89579729 is about 447.4418288357.

The spelling of 89579729 in words is "eighty-nine million, five hundred seventy-nine thousand, seven hundred twenty-nine".