12404989 has 2 divisors, whose sum is σ = 12404990. Its totient is φ = 12404988.

The previous prime is 12404971. The next prime is 12404999. The reversal of 12404989 is 98940421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8602489 + 3802500 = 2933^2 + 1950^2 .

It is a cyclic number.

It is not a de Polignac number, because 12404989 - 2⁵ = 12404957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12404999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6202494 + 6202495.

It is an arithmetic number, because the mean of its divisors is an integer number (6202495).

Almost surely, 2^12404989 is an apocalyptic number.

It is an amenable number.

12404989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12404989 is an equidigital number, since it uses as much as digits as its factorization.

12404989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 12404989 is about 3522.0716914907. The cubic root of 12404989 is about 231.4899429162.

The spelling of 12404989 in words is "twelve million, four hundred four thousand, nine hundred eighty-nine".