7979798 has 8 divisors (see below), whose sum is σ = 12039408. Its totient is φ = 3966664.

The previous prime is 7979779. The next prime is 7979813. The reversal of 7979798 is 8979797.

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

It is a super-2 number, since 2×7979798² = 127354352241608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11186 + ... + 11877.

It is an arithmetic number, because the mean of its divisors is an integer number (1504926).

Almost surely, 2^7979798 is an apocalyptic number.

7979798 is a deficient number, since it is larger than the sum of its proper divisors (4059610).

7979798 is a wasteful number, since it uses less digits than its factorization.

7979798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23238.

The product of its digits is 2000376, while the sum is 56.

The square root of 7979798 is about 2824.8536245264. The cubic root of 7979798 is about 199.8315080922.

Subtracting 7979798 from its reverse (8979797), we obtain a palindrome (999999).

It can be divided in two parts, 7 and 979798, that multiplied together give a palindrome (6858586).

The spelling of 7979798 in words is "seven million, nine hundred seventy-nine thousand, seven hundred ninety-eight".