513279391 has 2 divisors, whose sum is σ = 513279392. Its totient is φ = 513279390.

The previous prime is 513279379. The next prime is 513279397. The reversal of 513279391 is 193972315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513279391 - 2¹⁵ = 513246623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513279397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256639695 + 256639696.

It is an arithmetic number, because the mean of its divisors is an integer number (256639696).

Almost surely, 2^513279391 is an apocalyptic number.

513279391 is a deficient number, since it is larger than the sum of its proper divisors (1).

513279391 is an equidigital number, since it uses as much as digits as its factorization.

513279391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 40.

The square root of 513279391 is about 22655.6701732701. The cubic root of 513279391 is about 800.6657952214.

The spelling of 513279391 in words is "five hundred thirteen million, two hundred seventy-nine thousand, three hundred ninety-one".