13997523 has 16 divisors (see below), whose sum is σ = 19740672. Its totient is φ = 8808000.

The previous prime is 13997519. The next prime is 13997537. The reversal of 13997523 is 32579931.

It is not a de Polignac number, because 13997523 - 2² = 13997519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13997563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1978 + ... + 5648.

It is an arithmetic number, because the mean of its divisors is an integer number (1233792).

Almost surely, 2^13997523 is an apocalyptic number.

13997523 is a deficient number, since it is larger than the sum of its proper divisors (5743149).

13997523 is a wasteful number, since it uses less digits than its factorization.

13997523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746.

The product of its digits is 51030, while the sum is 39.

The square root of 13997523 is about 3741.3263690836. The cubic root of 13997523 is about 241.0000114782. Note that the first 4 decimals are identical.

The spelling of 13997523 in words is "thirteen million, nine hundred ninety-seven thousand, five hundred twenty-three".