12539389 has 2 divisors, whose sum is σ = 12539390. Its totient is φ = 12539388.

The previous prime is 12539383. The next prime is 12539467. The reversal of 12539389 is 98393521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9406489 + 3132900 = 3067^2 + 1770^2 .

It is an emirp because it is prime and its reverse (98393521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12539389 - 2⁵ = 12539357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12539383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6269694 + 6269695.

It is an arithmetic number, because the mean of its divisors is an integer number (6269695).

Almost surely, 2^12539389 is an apocalyptic number.

It is an amenable number.

12539389 is a deficient number, since it is larger than the sum of its proper divisors (1).

12539389 is an equidigital number, since it uses as much as digits as its factorization.

12539389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 12539389 is about 3541.0999703482. The cubic root of 12539389 is about 232.3229561351.

The spelling of 12539389 in words is "twelve million, five hundred thirty-nine thousand, three hundred eighty-nine".