93979981637 has 4 divisors (see below), whose sum is σ = 98926296480. Its totient is φ = 89033666796.

The previous prime is 93979981583. The next prime is 93979981643. The reversal of 93979981637 is 73618997939.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 93979981637 - 2²⁴ = 93963204421 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 (93979980637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2473157393 + ... + 2473157430.

It is an arithmetic number, because the mean of its divisors is an integer number (24731574120).

Almost surely, 2^93979981637 is an apocalyptic number.

It is an amenable number.

93979981637 is a deficient number, since it is larger than the sum of its proper divisors (4946314843).

93979981637 is a wasteful number, since it uses less digits than its factorization.

93979981637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4946314842.

The product of its digits is 138883248, while the sum is 71.

The spelling of 93979981637 in words is "ninety-three billion, nine hundred seventy-nine million, nine hundred eighty-one thousand, six hundred thirty-seven".