13137989 has 2 divisors, whose sum is σ = 13137990. Its totient is φ = 13137988.

The previous prime is 13137973. The next prime is 13138001. The reversal of 13137989 is 98973131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10349089 + 2788900 = 3217^2 + 1670^2 .

It is an emirp because it is prime and its reverse (98973131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13137989 - 2⁴ = 13137973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13137689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6568994 + 6568995.

It is an arithmetic number, because the mean of its divisors is an integer number (6568995).

Almost surely, 2^13137989 is an apocalyptic number.

It is an amenable number.

13137989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13137989 is an equidigital number, since it uses as much as digits as its factorization.

13137989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 41.

The square root of 13137989 is about 3624.6363955575. The cubic root of 13137989 is about 235.9624868556.

The spelling of 13137989 in words is "thirteen million, one hundred thirty-seven thousand, nine hundred eighty-nine".