7961979 has 24 divisors (see below), whose sum is σ = 11546640. Its totient is φ = 4873792.

The previous prime is 7961959. The next prime is 7961981. The reversal of 7961979 is 9791697.

It is not a de Polignac number, because 7961979 - 2¹³ = 7953787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7961929) 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 23 ways as a sum of consecutive naturals, for example, 45937 + ... + 46109.

It is an arithmetic number, because the mean of its divisors is an integer number (481110).

Almost surely, 2^7961979 is an apocalyptic number.

7961979 is a deficient number, since it is larger than the sum of its proper divisors (3584661).

7961979 is a wasteful number, since it uses less digits than its factorization.

7961979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 228 counting only the distinct ones).

The product of its digits is 214326, while the sum is 48.

The square root of 7961979 is about 2821.6978931133. The cubic root of 7961979 is about 199.6826550606.

It can be divided in two parts, 796 and 1979, that added together give a triangular number (2775 = T₇₄).

The spelling of 7961979 in words is "seven million, nine hundred sixty-one thousand, nine hundred seventy-nine".