13497987 has 16 divisors (see below), whose sum is σ = 19139328. Its totient is φ = 8442720.

The previous prime is 13497937. The next prime is 13497997. The reversal of 13497987 is 78979431.

It is not a de Polignac number, because 13497987 - 2¹¹ = 13495939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13497917) 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, 1812 + ... + 5502.

It is an arithmetic number, because the mean of its divisors is an integer number (1196208).

Almost surely, 2^13497987 is an apocalyptic number.

13497987 is a deficient number, since it is larger than the sum of its proper divisors (5641341).

13497987 is a wasteful number, since it uses less digits than its factorization.

13497987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770.

The product of its digits is 381024, while the sum is 48.

The square root of 13497987 is about 3673.9606693594. The cubic root of 13497987 is about 238.0983222502.

The spelling of 13497987 in words is "thirteen million, four hundred ninety-seven thousand, nine hundred eighty-seven".