7998008997 has 32 divisors (see below), whose sum is σ = 11831952384. Its totient is φ = 4765248000.

The previous prime is 7998008981. The next prime is 7998009001.

7998008997 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7998008997 - 2⁴ = 7998008981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7998008957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 475078 + ... + 491624.

It is an arithmetic number, because the mean of its divisors is an integer number (369748512).

Almost surely, 2^7998008997 is an apocalyptic number.

It is an amenable number.

7998008997 is a deficient number, since it is larger than the sum of its proper divisors (3833943387).

7998008997 is a wasteful number, since it uses less digits than its factorization.

7998008997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16809.

The product of its (nonzero) digits is 20575296, while the sum is 66.

The square root of 7998008997 is about 89431.5883622783. The cubic root of 7998008997 is about 1999.8340693172.

The spelling of 7998008997 in words is "seven billion, nine hundred ninety-eight million, eight thousand, nine hundred ninety-seven".