7971172394 has 8 divisors (see below), whose sum is σ = 11962782048. Its totient is φ = 3983578380.

The previous prime is 7971172379. The next prime is 7971172453. The reversal of 7971172394 is 4932711797.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 998942 + ... + 1006889.

It is an arithmetic number, because the mean of its divisors is an integer number (1495347756).

Almost surely, 2^7971172394 is an apocalyptic number.

7971172394 is a deficient number, since it is larger than the sum of its proper divisors (3991609654).

7971172394 is a wasteful number, since it uses less digits than its factorization.

7971172394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007820.

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

The square root of 7971172394 is about 89281.4224461058. The cubic root of 7971172394 is about 1997.5948081857.

The spelling of 7971172394 in words is "seven billion, nine hundred seventy-one million, one hundred seventy-two thousand, three hundred ninety-four".