79910987 has 8 divisors (see below), whose sum is σ = 86128560. Its totient is φ = 73703520.

The previous prime is 79910981. The next prime is 79911011. The reversal of 79910987 is 78901997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79910987 - 2¹⁴ = 79894603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79910981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25412 + ... + 28382.

It is an arithmetic number, because the mean of its divisors is an integer number (10766070).

Almost surely, 2^79910987 is an apocalyptic number.

79910987 is a deficient number, since it is larger than the sum of its proper divisors (6217573).

79910987 is a wasteful number, since it uses less digits than its factorization.

79910987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053.

The product of its (nonzero) digits is 285768, while the sum is 50.

The square root of 79910987 is about 8939.2945471105. The cubic root of 79910987 is about 430.7270681187.

The spelling of 79910987 in words is "seventy-nine million, nine hundred ten thousand, nine hundred eighty-seven".