13971933 has 20 divisors (see below), whose sum is σ = 21008988. Its totient is φ = 9253440.

The previous prime is 13971931. The next prime is 13971941. The reversal of 13971933 is 33917931.

It can be written as a sum of positive squares in 2 ways, for example, as 2152089 + 11819844 = 1467^2 + 3438^2 .

It is not a de Polignac number, because 13971933 - 2¹ = 13971931 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13971931) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14185 + ... + 15137.

Almost surely, 2^13971933 is an apocalyptic number.

It is an amenable number.

13971933 is a deficient number, since it is larger than the sum of its proper divisors (7037055).

13971933 is an equidigital number, since it uses as much as digits as its factorization.

13971933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146 (or 1137 counting only the distinct ones).

The product of its digits is 15309, while the sum is 36.

The square root of 13971933 is about 3737.9048944563. The cubic root of 13971933 is about 240.8530580408.

The spelling of 13971933 in words is "thirteen million, nine hundred seventy-one thousand, nine hundred thirty-three".