13087189 has 2 divisors, whose sum is σ = 13087190. Its totient is φ = 13087188.

The previous prime is 13087169. The next prime is 13087213. The reversal of 13087189 is 98178031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11168964 + 1918225 = 3342^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 13087189 - 2⁵ = 13087157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13087169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6543594 + 6543595.

It is an arithmetic number, because the mean of its divisors is an integer number (6543595).

Almost surely, 2^13087189 is an apocalyptic number.

It is an amenable number.

13087189 is a deficient number, since it is larger than the sum of its proper divisors (1).

13087189 is an equidigital number, since it uses as much as digits as its factorization.

13087189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 13087189 is about 3617.6220089998. The cubic root of 13087189 is about 235.6579659401.

The spelling of 13087189 in words is "thirteen million, eighty-seven thousand, one hundred eighty-nine".