12531889 has 2 divisors, whose sum is σ = 12531890. Its totient is φ = 12531888.

The previous prime is 12531859. The next prime is 12531913. The reversal of 12531889 is 98813521.

12531889 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12531600 + 289 = 3540^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 12531889 - 2¹¹ = 12529841 is a prime.

It is a super-3 number, since 3×12531889³ (a number of 22 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (12531809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6265944 + 6265945.

It is an arithmetic number, because the mean of its divisors is an integer number (6265945).

Almost surely, 2^12531889 is an apocalyptic number.

It is an amenable number.

12531889 is a deficient number, since it is larger than the sum of its proper divisors (1).

12531889 is an equidigital number, since it uses as much as digits as its factorization.

12531889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 37.

The square root of 12531889 is about 3540.0408189737. The cubic root of 12531889 is about 232.2766282618.

The spelling of 12531889 in words is "twelve million, five hundred thirty-one thousand, eight hundred eighty-nine".