7999172097 has 64 divisors (see below), whose sum is σ = 12700385280. Its totient is φ = 4384134144.

The previous prime is 7999172081. The next prime is 7999172099. The reversal of 7999172097 is 7902719997.

It is not a de Polignac number, because 7999172097 - 2⁴ = 7999172081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7999172097.

It is not an unprimeable number, because it can be changed into a prime (7999172099) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13489033 + ... + 13489625.

It is an arithmetic number, because the mean of its divisors is an integer number (198443520).

Almost surely, 2^7999172097 is an apocalyptic number.

It is an amenable number.

7999172097 is a deficient number, since it is larger than the sum of its proper divisors (4701213183).

7999172097 is a wasteful number, since it uses less digits than its factorization.

7999172097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902.

The product of its (nonzero) digits is 4500846, while the sum is 60.

The square root of 7999172097 is about 89438.0908617799. The cubic root of 7999172097 is about 1999.9310057033.

The spelling of 7999172097 in words is "seven billion, nine hundred ninety-nine million, one hundred seventy-two thousand, ninety-seven".