7949979 has 6 divisors (see below), whose sum is σ = 11483316. Its totient is φ = 5299980.

The previous prime is 7949933. The next prime is 7950001. The reversal of 7949979 is 9799497.

It is not a de Polignac number, because 7949979 - 2⁸ = 7949723 is a prime.

It is a super-2 number, since 2×7949979² = 126404332200882, which contains 22 as substring.

7949979 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7945979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 441657 + ... + 441674.

It is an arithmetic number, because the mean of its divisors is an integer number (1913886).

Almost surely, 2^7949979 is an apocalyptic number.

7949979 is a deficient number, since it is larger than the sum of its proper divisors (3533337).

7949979 is a wasteful number, since it uses less digits than its factorization.

7949979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883337 (or 883334 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 7949979 is about 2819.5707120056. The cubic root of 7949979 is about 199.5822865179.

The spelling of 7949979 in words is "seven million, nine hundred forty-nine thousand, nine hundred seventy-nine".