93872421 has 12 divisors (see below), whose sum is σ = 135789472. Its totient is φ = 62491176.

The previous prime is 93872393. The next prime is 93872447. The reversal of 93872421 is 12427839.

It is not a de Polignac number, because 93872421 - 2⁶ = 93872357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93872021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 631 + ... + 13716.

Almost surely, 2^93872421 is an apocalyptic number.

It is an amenable number.

93872421 is a deficient number, since it is larger than the sum of its proper divisors (41917051).

93872421 is a wasteful number, since it uses less digits than its factorization.

93872421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15080 (or 15077 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 93872421 is about 9688.7780963339. The cubic root of 93872421 is about 454.4777988408.

The spelling of 93872421 in words is "ninety-three million, eight hundred seventy-two thousand, four hundred twenty-one".