13931956 has 6 divisors (see below), whose sum is σ = 24380930. Its totient is φ = 6965976.

The previous prime is 13931933. The next prime is 13931987. The reversal of 13931956 is 65913931.

13931956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8503056 + 5428900 = 2916^2 + 2330^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1741491 + ... + 1741498.

Almost surely, 2^13931956 is an apocalyptic number.

It is an amenable number.

13931956 is a deficient number, since it is larger than the sum of its proper divisors (10448974).

13931956 is a wasteful number, since it uses less digits than its factorization.

13931956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482993 (or 3482991 counting only the distinct ones).

The product of its digits is 21870, while the sum is 37.

The square root of 13931956 is about 3732.5535495154. The cubic root of 13931956 is about 240.6231261112.

The spelling of 13931956 in words is "thirteen million, nine hundred thirty-one thousand, nine hundred fifty-six".