93439881 has 6 divisors (see below), whose sum is σ = 134968730. Its totient is φ = 62293248.

The previous prime is 93439877. The next prime is 93439909. The reversal of 93439881 is 18893439.

It can be written as a sum of positive squares in only one way, i.e., 77158656 + 16281225 = 8784^2 + 4035^2 .

It is not a de Polignac number, because 93439881 - 2² = 93439877 is a prime.

It is a super-2 number, since 2×93439881² = 17462022722588322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (93439081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5191096 + ... + 5191113.

Almost surely, 2^93439881 is an apocalyptic number.

It is an amenable number.

93439881 is a deficient number, since it is larger than the sum of its proper divisors (41528849).

93439881 is a wasteful number, since it uses less digits than its factorization.

93439881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10382215 (or 10382212 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 93439881 is about 9666.4306235549. The cubic root of 93439881 is about 453.7786849794.

The spelling of 93439881 in words is "ninety-three million, four hundred thirty-nine thousand, eight hundred eighty-one".