495939979 has 2 divisors, whose sum is σ = 495939980. Its totient is φ = 495939978.

The previous prime is 495939947. The next prime is 495940013. The reversal of 495939979 is 979939594.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 495939979 - 2⁵ = 495939947 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 495939979.

It is not a weakly prime, because it can be changed into another prime (495937979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247969989 + 247969990.

It is an arithmetic number, because the mean of its divisors is an integer number (247969990).

Almost surely, 2^495939979 is an apocalyptic number.

495939979 is a deficient number, since it is larger than the sum of its proper divisors (1).

495939979 is an equidigital number, since it uses as much as digits as its factorization.

495939979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24800580, while the sum is 64.

The square root of 495939979 is about 22269.7098993229. The cubic root of 495939979 is about 791.5463909959.

The spelling of 495939979 in words is "four hundred ninety-five million, nine hundred thirty-nine thousand, nine hundred seventy-nine".