13398687 has 12 divisors (see below), whose sum is σ = 19464120. Its totient is φ = 8881488.

The previous prime is 13398661. The next prime is 13398689. The reversal of 13398687 is 78689331.

It is a happy number.

It is not a de Polignac number, because 13398687 - 2²² = 9204383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13398689) 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, 2548 + ... + 5769.

It is an arithmetic number, because the mean of its divisors is an integer number (1622010).

Almost surely, 2^13398687 is an apocalyptic number.

13398687 is a deficient number, since it is larger than the sum of its proper divisors (6065433).

13398687 is a wasteful number, since it uses less digits than its factorization.

13398687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8502 (or 8499 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 13398687 is about 3660.4216970180. The cubic root of 13398687 is about 237.5130157225.

The spelling of 13398687 in words is "thirteen million, three hundred ninety-eight thousand, six hundred eighty-seven".