7979965 has 24 divisors (see below), whose sum is σ = 11467008. Its totient is φ = 5221920.

The previous prime is 7979957. The next prime is 7979969. The reversal of 7979965 is 5699797.

It is not a de Polignac number, because 7979965 - 2³ = 7979957 is a prime.

7979965 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7979969) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18300 + ... + 18730.

It is an arithmetic number, because the mean of its divisors is an integer number (477792).

Almost surely, 2^7979965 is an apocalyptic number.

It is an amenable number.

7979965 is a deficient number, since it is larger than the sum of its proper divisors (3487043).

7979965 is a wasteful number, since it uses less digits than its factorization.

7979965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 466 counting only the distinct ones).

The product of its digits is 1071630, while the sum is 52.

The square root of 7979965 is about 2824.8831834255. The cubic root of 7979965 is about 199.8329020970.

It can be divided in two parts, 797 and 9965, that multiplied together give a triangular number (7942105 = T₃₉₈₅).

The spelling of 7979965 in words is "seven million, nine hundred seventy-nine thousand, nine hundred sixty-five".