79864089 has 4 divisors (see below), whose sum is σ = 106485456. Its totient is φ = 53242724.

The previous prime is 79864063. The next prime is 79864097. The reversal of 79864089 is 98046897.

It is a happy number.

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 79864089 - 2⁹ = 79863577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79864009) 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, 13310679 + ... + 13310684.

It is an arithmetic number, because the mean of its divisors is an integer number (26621364).

Almost surely, 2^79864089 is an apocalyptic number.

It is an amenable number.

79864089 is a deficient number, since it is larger than the sum of its proper divisors (26621367).

79864089 is a wasteful number, since it uses less digits than its factorization.

79864089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26621366.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 79864089 is about 8936.6710244923. The cubic root of 79864089 is about 430.6427902166.

The spelling of 79864089 in words is "seventy-nine million, eight hundred sixty-four thousand, eighty-nine".