79564642 has 4 divisors (see below), whose sum is σ = 119346966. Its totient is φ = 39782320.

The previous prime is 79564637. The next prime is 79564673. The reversal of 79564642 is 24646597.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 60824401 + 18740241 = 7799^2 + 4329^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19891159 + ... + 19891162.

Almost surely, 2^79564642 is an apocalyptic number.

79564642 is a deficient number, since it is larger than the sum of its proper divisors (39782324).

79564642 is a wasteful number, since it uses less digits than its factorization.

79564642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39782323.

The product of its digits is 362880, while the sum is 43.

The square root of 79564642 is about 8919.9014568548. The cubic root of 79564642 is about 430.1038905275.

The spelling of 79564642 in words is "seventy-nine million, five hundred sixty-four thousand, six hundred forty-two".