7994522979 has 12 divisors (see below), whose sum is σ = 11556496536. Its totient is φ = 5325596352.

The previous prime is 7994522971. The next prime is 7994523023. The reversal of 7994522979 is 9792254997.

7994522979 is a `hidden beast` number, since 7 + 99 + 452 + 2 + 97 + 9 = 666.

It is not a de Polignac number, because 7994522979 - 2³ = 7994522971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7994522971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328054 + ... + 351579.

It is an arithmetic number, because the mean of its divisors is an integer number (963041378).

Almost surely, 2^7994522979 is an apocalyptic number.

7994522979 is a deficient number, since it is larger than the sum of its proper divisors (3561973557).

7994522979 is a wasteful number, since it uses less digits than its factorization.

7994522979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680946 (or 680943 counting only the distinct ones).

The product of its digits is 25719120, while the sum is 63.

The square root of 7994522979 is about 89412.0963796286. The cubic root of 7994522979 is about 1999.5434773848.

The spelling of 7994522979 in words is "seven billion, nine hundred ninety-four million, five hundred twenty-two thousand, nine hundred seventy-nine".