516971977 has 2 divisors, whose sum is σ = 516971978. Its totient is φ = 516971976.

The previous prime is 516971957. The next prime is 516972013. The reversal of 516971977 is 779179615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 495107001 + 21864976 = 22251^2 + 4676^2 .

It is a cyclic number.

It is not a de Polignac number, because 516971977 - 2¹⁵ = 516939209 is a prime.

It is not a weakly prime, because it can be changed into another prime (516971957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258485988 + 258485989.

It is an arithmetic number, because the mean of its divisors is an integer number (258485989).

Almost surely, 2^516971977 is an apocalyptic number.

It is an amenable number.

516971977 is a deficient number, since it is larger than the sum of its proper divisors (1).

516971977 is an equidigital number, since it uses as much as digits as its factorization.

516971977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 833490, while the sum is 52.

The square root of 516971977 is about 22737.0177683882. The cubic root of 516971977 is about 802.5812339360.

The spelling of 516971977 in words is "five hundred sixteen million, nine hundred seventy-one thousand, nine hundred seventy-seven".