7979691 has 8 divisors (see below), whose sum is σ = 10820160. Its totient is φ = 5229512.

The previous prime is 7979687. The next prime is 7979693. The reversal of 7979691 is 1969797.

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

It is a cyclic number.

It is not a de Polignac number, because 7979691 - 2² = 7979687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7979691.

It is not an unprimeable number, because it can be changed into a prime (7979693) 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, 22365 + ... + 22718.

It is an arithmetic number, because the mean of its divisors is an integer number (1352520).

Almost surely, 2^7979691 is an apocalyptic number.

7979691 is a deficient number, since it is larger than the sum of its proper divisors (2840469).

7979691 is a wasteful number, since it uses less digits than its factorization.

7979691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45145.

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

The square root of 7979691 is about 2824.8346854285. The cubic root of 7979691 is about 199.8306149173.

The spelling of 7979691 in words is "seven million, nine hundred seventy-nine thousand, six hundred ninety-one".