13696921 has 12 divisors (see below), whose sum is σ = 16055760. Its totient is φ = 11649960.

The previous prime is 13696873. The next prime is 13696931. The reversal of 13696921 is 12969631.

It is not a de Polignac number, because 13696921 - 2⁹ = 13696409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13696931) 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, 5806 + ... + 7816.

It is an arithmetic number, because the mean of its divisors is an integer number (1337980).

Almost surely, 2^13696921 is an apocalyptic number.

It is an amenable number.

13696921 is a deficient number, since it is larger than the sum of its proper divisors (2358839).

13696921 is a wasteful number, since it uses less digits than its factorization.

13696921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164 (or 2157 counting only the distinct ones).

The product of its digits is 17496, while the sum is 37.

The square root of 13696921 is about 3700.9351520933. The cubic root of 13696921 is about 239.2623240861.

The spelling of 13696921 in words is "thirteen million, six hundred ninety-six thousand, nine hundred twenty-one".