79905089 has 16 divisors (see below), whose sum is σ = 94246080. Its totient is φ = 66951360.

The previous prime is 79905061. The next prime is 79905107. The reversal of 79905089 is 98050997.

It is a cyclic number.

It is not a de Polignac number, because 79905089 - 2¹² = 79900993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79905689) 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, 2567 + ... + 12899.

It is an arithmetic number, because the mean of its divisors is an integer number (5890380).

Almost surely, 2^79905089 is an apocalyptic number.

It is an amenable number.

79905089 is a deficient number, since it is larger than the sum of its proper divisors (14340991).

79905089 is a wasteful number, since it uses less digits than its factorization.

79905089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10400.

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

The square root of 79905089 is about 8938.9646492197. The cubic root of 79905089 is about 430.7164709495.

The spelling of 79905089 in words is "seventy-nine million, nine hundred five thousand, eighty-nine".