93631421 has 4 divisors (see below), whose sum is σ = 100833852. Its totient is φ = 86428992.

The previous prime is 93631403. The next prime is 93631457. The reversal of 93631421 is 12413639.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12413639 = 7 ⋅1773377.

It can be written as a sum of positive squares in 2 ways, for example, as 4120900 + 89510521 = 2030^2 + 9461^2 .

It is a de Polignac number, because none of the positive numbers 2^k-93631421 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 (93631621) 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, 3601196 + ... + 3601221.

It is an arithmetic number, because the mean of its divisors is an integer number (25208463).

Almost surely, 2^93631421 is an apocalyptic number.

It is an amenable number.

93631421 is a deficient number, since it is larger than the sum of its proper divisors (7202431).

93631421 is a wasteful number, since it uses less digits than its factorization.

93631421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7202430.

The product of its digits is 3888, while the sum is 29.

The square root of 93631421 is about 9676.3330347813. Note that the first 3 decimals coincide. The cubic root of 93631421 is about 454.0885364277.

The spelling of 93631421 in words is "ninety-three million, six hundred thirty-one thousand, four hundred twenty-one".