13575987 has 12 divisors (see below), whose sum is σ = 19661824. Its totient is φ = 9026640.

The previous prime is 13575983. The next prime is 13576007. The reversal of 13575987 is 78957531.

13575987 is a `hidden beast` number, since 1 + 3 + 57 + 598 + 7 = 666.

It is not a de Polignac number, because 13575987 - 2² = 13575983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13575983) 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, 1998 + ... + 5580.

Almost surely, 2^13575987 is an apocalyptic number.

13575987 is a deficient number, since it is larger than the sum of its proper divisors (6085837).

13575987 is a wasteful number, since it uses less digits than its factorization.

13575987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010 (or 4007 counting only the distinct ones).

The product of its digits is 264600, while the sum is 45.

The square root of 13575987 is about 3684.5606250949. The cubic root of 13575987 is about 238.5560697782.

The spelling of 13575987 in words is "thirteen million, five hundred seventy-five thousand, nine hundred eighty-seven".