13131387 has 12 divisors (see below), whose sum is σ = 18999864. Its totient is φ = 8739360.

The previous prime is 13131373. The next prime is 13131401. The reversal of 13131387 is 78313131.

It is an interprime number because it is at equal distance from previous prime (13131373) and next prime (13131401).

It is not a de Polignac number, because 13131387 - 2¹⁰ = 13130363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13131387.

It is not an unprimeable number, because it can be changed into a prime (13131317) 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, 7812 + ... + 9342.

It is an arithmetic number, because the mean of its divisors is an integer number (1583322).

Almost surely, 2^13131387 is an apocalyptic number.

13131387 is a deficient number, since it is larger than the sum of its proper divisors (5868477).

13131387 is a wasteful number, since it uses less digits than its factorization.

13131387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490 (or 2487 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 13131387 is about 3623.7255690794. The cubic root of 13131387 is about 235.9229555556.

The spelling of 13131387 in words is "thirteen million, one hundred thirty-one thousand, three hundred eighty-seven".