93993921 has 12 divisors (see below), whose sum is σ = 155164672. Its totient is φ = 53710776.

The previous prime is 93993899. The next prime is 93993929. The reversal of 93993921 is 12939939.

It is not a de Polignac number, because 93993921 - 2⁷ = 93993793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (93993929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 745921 + ... + 746046.

Almost surely, 2^93993921 is an apocalyptic number.

It is an amenable number.

93993921 is a deficient number, since it is larger than the sum of its proper divisors (61170751).

93993921 is a wasteful number, since it uses less digits than its factorization.

93993921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491980 (or 1491977 counting only the distinct ones).

The product of its digits is 118098, while the sum is 45.

The square root of 93993921 is about 9695.0462092762. The cubic root of 93993921 is about 454.6737926714.

The spelling of 93993921 in words is "ninety-three million, nine hundred ninety-three thousand, nine hundred twenty-one".