79510985 has 4 divisors (see below), whose sum is σ = 95413188. Its totient is φ = 63608784.

The previous prime is 79510979. The next prime is 79510987. The reversal of 79510985 is 58901597.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58901597 = 23 ⋅2560939.

It can be written as a sum of positive squares in 2 ways, for example, as 36096064 + 43414921 = 6008^2 + 6589^2 .

It is a cyclic number.

It is not a de Polignac number, because 79510985 - 2⁸ = 79510729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79510987) 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, 7951094 + ... + 7951103.

It is an arithmetic number, because the mean of its divisors is an integer number (23853297).

Almost surely, 2^79510985 is an apocalyptic number.

It is an amenable number.

79510985 is a deficient number, since it is larger than the sum of its proper divisors (15902203).

79510985 is a wasteful number, since it uses less digits than its factorization.

79510985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15902202.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 79510985 is about 8916.8932369968. The cubic root of 79510985 is about 430.0071839434.

The spelling of 79510985 in words is "seventy-nine million, five hundred ten thousand, nine hundred eighty-five".