511135979 has 2 divisors, whose sum is σ = 511135980. Its totient is φ = 511135978.

The previous prime is 511135949. The next prime is 511135981. The reversal of 511135979 is 979531115.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511135979 is a prime.

It is a super-2 number, since 2×511135979² = 522519978056576882, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 511135981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (511135949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255567989 + 255567990.

It is an arithmetic number, because the mean of its divisors is an integer number (255567990).

Almost surely, 2^511135979 is an apocalyptic number.

511135979 is a deficient number, since it is larger than the sum of its proper divisors (1).

511135979 is an equidigital number, since it uses as much as digits as its factorization.

511135979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42525, while the sum is 41.

The square root of 511135979 is about 22608.3165892554. The cubic root of 511135979 is about 799.5497356876.

The spelling of 511135979 in words is "five hundred eleven million, one hundred thirty-five thousand, nine hundred seventy-nine".