7997920001 has 8 divisors (see below), whose sum is σ = 8026387200. Its totient is φ = 7969502800.

The previous prime is 7997919997. The next prime is 7997920013. The reversal of 7997920001 is 1000297997.

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

It is a cyclic number.

It is not a de Polignac number, because 7997920001 - 2² = 7997919997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7997920081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323870 + ... + 347688.

It is an arithmetic number, because the mean of its divisors is an integer number (1003298400).

Almost surely, 2^7997920001 is an apocalyptic number.

It is an amenable number.

7997920001 is a deficient number, since it is larger than the sum of its proper divisors (28467199).

7997920001 is a wasteful number, since it uses less digits than its factorization.

7997920001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24999.

The product of its (nonzero) digits is 71442, while the sum is 44.

The square root of 7997920001 is about 89431.0907962102. The cubic root of 7997920001 is about 1999.8266517256.

The spelling of 7997920001 in words is "seven billion, nine hundred ninety-seven million, nine hundred twenty thousand, one".