617978079 has 10 divisors (see below), whose sum is σ = 923152560. Its totient is φ = 411985332.

The previous prime is 617978057. The next prime is 617978083. The reversal of 617978079 is 970879716.

It is not a de Polignac number, because 617978079 - 2⁷ = 617977951 is a prime.

It is a super-2 number, since 2×617978079² = 763793812249060482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617978029) 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 in 9 ways as a sum of consecutive naturals, for example, 3814599 + ... + 3814760.

It is an arithmetic number, because the mean of its divisors is an integer number (92315256).

Almost surely, 2^617978079 is an apocalyptic number.

617978079 is a deficient number, since it is larger than the sum of its proper divisors (305174481).

617978079 is an equidigital number, since it uses as much as digits as its factorization.

617978079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7629371 (or 7629362 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 54.

The square root of 617978079 is about 24859.1648894326. The cubic root of 617978079 is about 851.7739556057.

The spelling of 617978079 in words is "six hundred seventeen million, nine hundred seventy-eight thousand, seventy-nine".