13931672 has 8 divisors (see below), whose sum is σ = 26121900. Its totient is φ = 6965832.

The previous prime is 13931669. The next prime is 13931681. The reversal of 13931672 is 27613931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

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, 870722 + ... + 870737.

Almost surely, 2^13931672 is an apocalyptic number.

It is an amenable number.

13931672 is a deficient number, since it is larger than the sum of its proper divisors (12190228).

13931672 is a wasteful number, since it uses less digits than its factorization.

13931672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741465 (or 1741461 counting only the distinct ones).

The product of its digits is 6804, while the sum is 32.

The square root of 13931672 is about 3732.5155056610. The cubic root of 13931672 is about 240.6214910828.

The spelling of 13931672 in words is "thirteen million, nine hundred thirty-one thousand, six hundred seventy-two".