93479981 has 16 divisors (see below), whose sum is σ = 117350400. Its totient is φ = 72605808.

The previous prime is 93479977. The next prime is 93479987. The reversal of 93479981 is 18997439.

It is a cyclic number.

It is not a de Polignac number, because 93479981 - 2² = 93479977 is a prime.

It is a super-2 number, since 2×93479981² = 17477013695520722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93479987) 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, 12221 + ... + 18338.

It is an arithmetic number, because the mean of its divisors is an integer number (7334400).

Almost surely, 2^93479981 is an apocalyptic number.

It is an amenable number.

93479981 is a deficient number, since it is larger than the sum of its proper divisors (23870419).

93479981 is a wasteful number, since it uses less digits than its factorization.

93479981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30608.

The product of its digits is 489888, while the sum is 50.

The square root of 93479981 is about 9668.5045896457. The cubic root of 93479981 is about 453.8435891818.

The spelling of 93479981 in words is "ninety-three million, four hundred seventy-nine thousand, nine hundred eighty-one".