7971942731 has 8 divisors (see below), whose sum is σ = 8216885424. Its totient is φ = 7729706880.

The previous prime is 7971942697. The next prime is 7971942739. The reversal of 7971942731 is 1372491797.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7971942731 is a prime.

It is a super-2 number, since 2×7971942731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7971942731.

It is not an unprimeable number, because it can be changed into a prime (7971942739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670730 + ... + 682511.

It is an arithmetic number, because the mean of its divisors is an integer number (1027110678).

Almost surely, 2^7971942731 is an apocalyptic number.

7971942731 is a deficient number, since it is larger than the sum of its proper divisors (244942693).

7971942731 is a wasteful number, since it uses less digits than its factorization.

7971942731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353421.

The product of its digits is 666792, while the sum is 50.

The square root of 7971942731 is about 89285.7364364544. The cubic root of 7971942731 is about 1997.6591555425.

The spelling of 7971942731 in words is "seven billion, nine hundred seventy-one million, nine hundred forty-two thousand, seven hundred thirty-one".