13968657 has 12 divisors (see below), whose sum is σ = 20326020. Its totient is φ = 9243648.

The previous prime is 13968653. The next prime is 13968671. The reversal of 13968657 is 75686931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6548481 + 7420176 = 2559^2 + 2724^2 .

It is not a de Polignac number, because 13968657 - 2² = 13968653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13968653) 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, 4432 + ... + 6897.

It is an arithmetic number, because the mean of its divisors is an integer number (1693835).

Almost surely, 2^13968657 is an apocalyptic number.

It is an amenable number.

13968657 is a deficient number, since it is larger than the sum of its proper divisors (6357363).

13968657 is a wasteful number, since it uses less digits than its factorization.

13968657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11472 (or 11469 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 13968657 is about 3737.4666553697. The cubic root of 13968657 is about 240.8342322922.

The spelling of 13968657 in words is "thirteen million, nine hundred sixty-eight thousand, six hundred fifty-seven".