7979638231 has 8 divisors (see below), whose sum is σ = 8310204000. Its totient is φ = 7652766240.

The previous prime is 7979638229. The next prime is 7979638283. The reversal of 7979638231 is 1328369797.

It is a happy number.

7979638231 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7979638231 - 2¹ = 7979638229 is a prime.

It is a super-2 number, since 2×7979638231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7979638531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919035 + ... + 927676.

It is an arithmetic number, because the mean of its divisors is an integer number (1038775500).

Almost surely, 2^7979638231 is an apocalyptic number.

7979638231 is a deficient number, since it is larger than the sum of its proper divisors (330565769).

7979638231 is a wasteful number, since it uses less digits than its factorization.

7979638231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846889.

The product of its digits is 3429216, while the sum is 55.

The square root of 7979638231 is about 89328.8208306815. The cubic root of 7979638231 is about 1998.3017442886.

The spelling of 7979638231 in words is "seven billion, nine hundred seventy-nine million, six hundred thirty-eight thousand, two hundred thirty-one".