511379969 has 2 divisors, whose sum is σ = 511379970. Its totient is φ = 511379968.

The previous prime is 511379917. The next prime is 511379971. The reversal of 511379969 is 969973115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 474716944 + 36663025 = 21788^2 + 6055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511379969 is a prime.

It is a super-2 number, since 2×511379969² = 523018945388881922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 511379971, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (511379989) 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, 255689984 + 255689985.

It is an arithmetic number, because the mean of its divisors is an integer number (255689985).

Almost surely, 2^511379969 is an apocalyptic number.

It is an amenable number.

511379969 is a deficient number, since it is larger than the sum of its proper divisors (1).

511379969 is an equidigital number, since it uses as much as digits as its factorization.

511379969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 459270, while the sum is 50.

The square root of 511379969 is about 22613.7119686265. The cubic root of 511379969 is about 799.6769367427.

The spelling of 511379969 in words is "five hundred eleven million, three hundred seventy-nine thousand, nine hundred sixty-nine".