512004391 has 2 divisors, whose sum is σ = 512004392. Its totient is φ = 512004390.

The previous prime is 512004377. The next prime is 512004413. The reversal of 512004391 is 193400215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 512004391 - 2⁷ = 512004263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512004331) 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, 256002195 + 256002196.

It is an arithmetic number, because the mean of its divisors is an integer number (256002196).

Almost surely, 2^512004391 is an apocalyptic number.

512004391 is a deficient number, since it is larger than the sum of its proper divisors (1).

512004391 is an equidigital number, since it uses as much as digits as its factorization.

512004391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 512004391 is about 22627.5140260701. The cubic root of 512004391 is about 800.0022869726.

The spelling of 512004391 in words is "five hundred twelve million, four thousand, three hundred ninety-one".