7979791 has 8 divisors (see below), whose sum is σ = 8468480. Its totient is φ = 7498008.

The previous prime is 7979779. The next prime is 7979813. The reversal of 7979791 is 1979797.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7979791 - 2⁷ = 7979663 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7979771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760 + ... + 4066.

It is an arithmetic number, because the mean of its divisors is an integer number (1058560).

Almost surely, 2^7979791 is an apocalyptic number.

7979791 is a deficient number, since it is larger than the sum of its proper divisors (488689).

7979791 is a wasteful number, since it uses less digits than its factorization.

7979791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3453.

The product of its digits is 250047, while the sum is 49.

The square root of 7979791 is about 2824.8523855239. The cubic root of 7979791 is about 199.8314496605.

The spelling of 7979791 in words is "seven million, nine hundred seventy-nine thousand, seven hundred ninety-one".