7919979 has 24 divisors (see below), whose sum is σ = 11411712. Its totient is φ = 4883760.

The previous prime is 7919971. The next prime is 7919993. The reversal of 7919979 is 9799197.

It is not a de Polignac number, because 7919979 - 2³ = 7919971 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7919971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76842 + ... + 76944.

It is an arithmetic number, because the mean of its divisors is an integer number (475488).

Almost surely, 2^7919979 is an apocalyptic number.

7919979 is a deficient number, since it is larger than the sum of its proper divisors (3491733).

7919979 is a wasteful number, since it uses less digits than its factorization.

7919979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 196 counting only the distinct ones).

The product of its digits is 321489, while the sum is 51.

The square root of 7919979 is about 2814.2457248790. The cubic root of 7919979 is about 199.3309225059.

The spelling of 7919979 in words is "seven million, nine hundred nineteen thousand, nine hundred seventy-nine".