93987979 has 4 divisors (see below), whose sum is σ = 94320376. Its totient is φ = 93655584.

The previous prime is 93987967. The next prime is 93987997. The reversal of 93987979 is 97978939.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97978939 = 17 ⋅5763467.

It is a cyclic number.

It is not a de Polignac number, because 93987979 - 2⁵ = 93987947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (93987479) 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, 165774 + ... + 166339.

It is an arithmetic number, because the mean of its divisors is an integer number (23580094).

Almost surely, 2^93987979 is an apocalyptic number.

93987979 is a deficient number, since it is larger than the sum of its proper divisors (332397).

93987979 is a wasteful number, since it uses less digits than its factorization.

93987979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332396.

The product of its digits is 7715736, while the sum is 61.

The square root of 93987979 is about 9694.7397592715. The cubic root of 93987979 is about 454.6642114539.

The spelling of 93987979 in words is "ninety-three million, nine hundred eighty-seven thousand, nine hundred seventy-nine".