93390731 has 8 divisors (see below), whose sum is σ = 107009760. Its totient is φ = 79841088.

The previous prime is 93390721. The next prime is 93390733. The reversal of 93390731 is 13709339.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-93390731 is a prime.

It is a super-2 number, since 2×93390731² = 17443657273428722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 93390691 and 93390700.

It is not an unprimeable number, because it can be changed into a prime (93390733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14426 + ... + 19871.

It is an arithmetic number, because the mean of its divisors is an integer number (13376220).

Almost surely, 2^93390731 is an apocalyptic number.

93390731 is a deficient number, since it is larger than the sum of its proper divisors (13619029).

93390731 is a wasteful number, since it uses less digits than its factorization.

93390731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34693.

The product of its (nonzero) digits is 15309, while the sum is 35.

The square root of 93390731 is about 9663.8879856919. The cubic root of 93390731 is about 453.6991074877.

The spelling of 93390731 in words is "ninety-three million, three hundred ninety thousand, seven hundred thirty-one".