12372809 has 2 divisors, whose sum is σ = 12372810. Its totient is φ = 12372808.

The previous prime is 12372793. The next prime is 12372817. The reversal of 12372809 is 90827321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6864400 + 5508409 = 2620^2 + 2347^2 .

It is a cyclic number.

It is not a de Polignac number, because 12372809 - 2⁴ = 12372793 is a prime.

It is not a weakly prime, because it can be changed into another prime (12372859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6186404 + 6186405.

It is an arithmetic number, because the mean of its divisors is an integer number (6186405).

Almost surely, 2^12372809 is an apocalyptic number.

It is an amenable number.

12372809 is a deficient number, since it is larger than the sum of its proper divisors (1).

12372809 is an equidigital number, since it uses as much as digits as its factorization.

12372809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 12372809 is about 3517.5003909026. The cubic root of 12372809 is about 231.2895988677.

The spelling of 12372809 in words is "twelve million, three hundred seventy-two thousand, eight hundred nine".