79005989 has 16 divisors (see below), whose sum is σ = 85231872. Its totient is φ = 73041408.

The previous prime is 79005967. The next prime is 79006033. The reversal of 79005989 is 98950097.

It is a cyclic number.

It is not a de Polignac number, because 79005989 - 2⁸ = 79005733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79005089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223637 + ... + 223989.

It is an arithmetic number, because the mean of its divisors is an integer number (5326992).

Almost surely, 2^79005989 is an apocalyptic number.

It is an amenable number.

79005989 is a deficient number, since it is larger than the sum of its proper divisors (6225883).

79005989 is a wasteful number, since it uses less digits than its factorization.

79005989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676.

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 79005989 is about 8888.5313185025. The cubic root of 79005989 is about 429.0948854005.

The spelling of 79005989 in words is "seventy-nine million, five thousand, nine hundred eighty-nine".