7979163181 has 4 divisors (see below), whose sum is σ = 8704541664. Its totient is φ = 7253784700.

The previous prime is 7979163169. The next prime is 7979163323. The reversal of 7979163181 is 1813619797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1813619797 = 11 ⋅164874527.

It is a cyclic number.

It is not a de Polignac number, because 7979163181 - 2⁹ = 7979162669 is a prime.

It is a super-2 number, since 2×7979163181² (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 (7979163781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362689225 + ... + 362689246.

It is an arithmetic number, because the mean of its divisors is an integer number (2176135416).

Almost surely, 2^7979163181 is an apocalyptic number.

It is an amenable number.

7979163181 is a deficient number, since it is larger than the sum of its proper divisors (725378483).

7979163181 is a wasteful number, since it uses less digits than its factorization.

7979163181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725378482.

The product of its digits is 571536, while the sum is 52.

The square root of 7979163181 is about 89326.1617948516. The cubic root of 7979163181 is about 1998.2620886862.

The spelling of 7979163181 in words is "seven billion, nine hundred seventy-nine million, one hundred sixty-three thousand, one hundred eighty-one".