12390887 has 2 divisors, whose sum is σ = 12390888. Its totient is φ = 12390886.

The previous prime is 12390883. The next prime is 12390919. The reversal of 12390887 is 78809321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12390887 - 2² = 12390883 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12390887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12390883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6195443 + 6195444.

It is an arithmetic number, because the mean of its divisors is an integer number (6195444).

Almost surely, 2^12390887 is an apocalyptic number.

12390887 is a deficient number, since it is larger than the sum of its proper divisors (1).

12390887 is an equidigital number, since it uses as much as digits as its factorization.

12390887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 12390887 is about 3520.0691754566. The cubic root of 12390887 is about 231.4021903468.

The spelling of 12390887 in words is "twelve million, three hundred ninety thousand, eight hundred eighty-seven".