79432561 has 8 divisors (see below), whose sum is σ = 86391144. Its totient is φ = 72595200.

The previous prime is 79432513. The next prime is 79432579. The reversal of 79432561 is 16523497.

It can be written as a sum of positive squares in 4 ways, for example, as 37442161 + 41990400 = 6119^2 + 6480^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79432561 - 2⁷ = 79432433 is a prime.

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 79432561.

It is not an unprimeable number, because it can be changed into a prime (79432511) 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 7 ways as a sum of consecutive naturals, for example, 28936 + ... + 31561.

It is an arithmetic number, because the mean of its divisors is an integer number (10798893).

Almost surely, 2^79432561 is an apocalyptic number.

It is an amenable number.

79432561 is a deficient number, since it is larger than the sum of its proper divisors (6958583).

79432561 is a wasteful number, since it uses less digits than its factorization.

79432561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60611.

The product of its digits is 45360, while the sum is 37.

The square root of 79432561 is about 8912.4946563799. The cubic root of 79432561 is about 429.8657612341.

The spelling of 79432561 in words is "seventy-nine million, four hundred thirty-two thousand, five hundred sixty-one".