12316639 has 2 divisors, whose sum is σ = 12316640. Its totient is φ = 12316638.

The previous prime is 12316631. The next prime is 12316643. The reversal of 12316639 is 93661321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12316639 - 2³ = 12316631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12316639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12316631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6158319 + 6158320.

It is an arithmetic number, because the mean of its divisors is an integer number (6158320).

Almost surely, 2^12316639 is an apocalyptic number.

12316639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12316639 is an equidigital number, since it uses as much as digits as its factorization.

12316639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 31.

The square root of 12316639 is about 3509.5069454269. The cubic root of 12316639 is about 230.9390655292.

The spelling of 12316639 in words is "twelve million, three hundred sixteen thousand, six hundred thirty-nine".