93861921 has 4 divisors (see below), whose sum is σ = 125149232. Its totient is φ = 62574612.

The previous prime is 93861917. The next prime is 93861931. The reversal of 93861921 is 12916839.

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 not a de Polignac number, because 93861921 - 2² = 93861917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 93861921.

It is not an unprimeable number, because it can be changed into a prime (93861931) 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, 15643651 + ... + 15643656.

It is an arithmetic number, because the mean of its divisors is an integer number (31287308).

Almost surely, 2^93861921 is an apocalyptic number.

It is an amenable number.

93861921 is a deficient number, since it is larger than the sum of its proper divisors (31287311).

93861921 is a wasteful number, since it uses less digits than its factorization.

93861921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31287310.

The product of its digits is 23328, while the sum is 39.

The square root of 93861921 is about 9688.2362171863. The cubic root of 93861921 is about 454.4608531650.

The spelling of 93861921 in words is "ninety-three million, eight hundred sixty-one thousand, nine hundred twenty-one".