7972112913 has 4 divisors (see below), whose sum is σ = 10629483888. Its totient is φ = 5314741940.

The previous prime is 7972112909. The next prime is 7972112917. The reversal of 7972112913 is 3192112797.

It is a happy number.

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.

It is an interprime number because it is at equal distance from previous prime (7972112909) and next prime (7972112917).

It is a cyclic number.

It is not a de Polignac number, because 7972112913 - 2² = 7972112909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7972112917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328685483 + ... + 1328685488.

It is an arithmetic number, because the mean of its divisors is an integer number (2657370972).

Almost surely, 2^7972112913 is an apocalyptic number.

It is an amenable number.

7972112913 is a deficient number, since it is larger than the sum of its proper divisors (2657370975).

7972112913 is a wasteful number, since it uses less digits than its factorization.

7972112913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657370974.

The product of its digits is 47628, while the sum is 42.

The square root of 7972112913 is about 89286.6894503318. The cubic root of 7972112913 is about 1997.6733705305.

The spelling of 7972112913 in words is "seven billion, nine hundred seventy-two million, one hundred twelve thousand, nine hundred thirteen".