93988281 has 16 divisors (see below), whose sum is σ = 131209344. Its totient is φ = 59731584.

The previous prime is 93988273. The next prime is 93988339. The reversal of 93988281 is 18288939.

It is a happy number.

It is not a de Polignac number, because 93988281 - 2³ = 93988273 is a prime.

It is a super-2 number, since 2×93988281² = 17667593930669922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 93988281.

It is not an unprimeable number, because it can be changed into a prime (93988201) 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, 19725 + ... + 24021.

It is an arithmetic number, because the mean of its divisors is an integer number (8200584).

Almost surely, 2^93988281 is an apocalyptic number.

It is an amenable number.

93988281 is a deficient number, since it is larger than the sum of its proper divisors (37221063).

93988281 is a wasteful number, since it uses less digits than its factorization.

93988281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4640.

The product of its digits is 248832, while the sum is 48.

The square root of 93988281 is about 9694.7553347158. The cubic root of 93988281 is about 454.6646984255.

The spelling of 93988281 in words is "ninety-three million, nine hundred eighty-eight thousand, two hundred eighty-one".