13993091 has 12 divisors (see below), whose sum is σ = 16990608. Its totient is φ = 11286912.

The previous prime is 13993087. The next prime is 13993127. The reversal of 13993091 is 19039931.

It is a happy number.

It is not a de Polignac number, because 13993091 - 2² = 13993087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13993691) 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, 1436 + ... + 5481.

It is an arithmetic number, because the mean of its divisors is an integer number (1415884).

Almost surely, 2^13993091 is an apocalyptic number.

13993091 is a deficient number, since it is larger than the sum of its proper divisors (2997517).

13993091 is an equidigital number, since it uses as much as digits as its factorization.

13993091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6958 (or 6941 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 35.

The square root of 13993091 is about 3740.7340188792. The cubic root of 13993091 is about 240.9745730536.

The spelling of 13993091 in words is "thirteen million, nine hundred ninety-three thousand, ninety-one".