7990997 has 4 divisors (see below), whose sum is σ = 9132576. Its totient is φ = 6849420.

The previous prime is 7990993. The next prime is 7990999.

7990997 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7990997 - 2² = 7990993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7990993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570779 + ... + 570792.

It is an arithmetic number, because the mean of its divisors is an integer number (2283144).

Almost surely, 2^7990997 is an apocalyptic number.

It is an amenable number.

7990997 is a deficient number, since it is larger than the sum of its proper divisors (1141579).

7990997 is a wasteful number, since it uses less digits than its factorization.

7990997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141578.

The product of its (nonzero) digits is 321489, while the sum is 50.

The square root of 7990997 is about 2826.8351561419. The cubic root of 7990997 is about 199.9249468386.

The spelling of 7990997 in words is "seven million, nine hundred ninety thousand, nine hundred ninety-seven".