12390919 has 2 divisors, whose sum is σ = 12390920. Its totient is φ = 12390918.

The previous prime is 12390887. The next prime is 12390929. The reversal of 12390919 is 91909321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12390919 - 2⁵ = 12390887 is a prime.

It is a super-2 number, since 2×12390919² = 307069747329122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12390929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6195459 + 6195460.

It is an arithmetic number, because the mean of its divisors is an integer number (6195460).

Almost surely, 2^12390919 is an apocalyptic number.

12390919 is a deficient number, since it is larger than the sum of its proper divisors (1).

12390919 is an equidigital number, since it uses as much as digits as its factorization.

12390919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 12390919 is about 3520.0737208189. The cubic root of 12390919 is about 231.4023895487.

The spelling of 12390919 in words is "twelve million, three hundred ninety thousand, nine hundred nineteen".