513220979 has 2 divisors, whose sum is σ = 513220980. Its totient is φ = 513220978.

The previous prime is 513220937. The next prime is 513220991. The reversal of 513220979 is 979022315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513220979 - 2²⁸ = 244785523 is a prime.

It is not a weakly prime, because it can be changed into another prime (513220909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256610489 + 256610490.

It is an arithmetic number, because the mean of its divisors is an integer number (256610490).

Almost surely, 2^513220979 is an apocalyptic number.

513220979 is a deficient number, since it is larger than the sum of its proper divisors (1).

513220979 is an equidigital number, since it uses as much as digits as its factorization.

513220979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 513220979 is about 22654.3810111863. The cubic root of 513220979 is about 800.6354217279.

The spelling of 513220979 in words is "five hundred thirteen million, two hundred twenty thousand, nine hundred seventy-nine".