13151989 has 2 divisors, whose sum is σ = 13151990. Its totient is φ = 13151988.

The previous prime is 13151977. The next prime is 13152011. The reversal of 13151989 is 98915131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8236900 + 4915089 = 2870^2 + 2217^2 .

It is a cyclic number.

It is not a de Polignac number, because 13151989 - 2⁷ = 13151861 is a prime.

It is a super-2 number, since 2×13151989² = 345949629312242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13151189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6575994 + 6575995.

It is an arithmetic number, because the mean of its divisors is an integer number (6575995).

Almost surely, 2^13151989 is an apocalyptic number.

It is an amenable number.

13151989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13151989 is an equidigital number, since it uses as much as digits as its factorization.

13151989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 37.

The square root of 13151989 is about 3626.5671095404. The cubic root of 13151989 is about 236.0462719286.

The spelling of 13151989 in words is "thirteen million, one hundred fifty-one thousand, nine hundred eighty-nine".