516564379 has 2 divisors, whose sum is σ = 516564380. Its totient is φ = 516564378.

The previous prime is 516564359. The next prime is 516564403. The reversal of 516564379 is 973465615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 516564379 - 2⁹ = 516563867 is a prime.

It is not a weakly prime, because it can be changed into another prime (516564359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258282189 + 258282190.

It is an arithmetic number, because the mean of its divisors is an integer number (258282190).

Almost surely, 2^516564379 is an apocalyptic number.

516564379 is a deficient number, since it is larger than the sum of its proper divisors (1).

516564379 is an equidigital number, since it uses as much as digits as its factorization.

516564379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 46.

The square root of 516564379 is about 22728.0526882529. The cubic root of 516564379 is about 802.3702511803.

The spelling of 516564379 in words is "five hundred sixteen million, five hundred sixty-four thousand, three hundred seventy-nine".