7990000997 has 4 divisors (see below), whose sum is σ = 8716364736. Its totient is φ = 7263637260.

The previous prime is 7990000979. The next prime is 7990000999.

7990000997 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 not a de Polignac number, because 7990000997 - 2⁸ = 7990000741 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 (7990000999) 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, 363181853 + ... + 363181874.

It is an arithmetic number, because the mean of its divisors is an integer number (2179091184).

Almost surely, 2^7990000997 is an apocalyptic number.

It is an amenable number.

7990000997 is a deficient number, since it is larger than the sum of its proper divisors (726363739).

7990000997 is a wasteful number, since it uses less digits than its factorization.

7990000997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726363738.

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

The square root of 7990000997 is about 89386.8054972321. The cubic root of 7990000997 is about 1999.1664023558.

It can be divided in two parts, 7990000 and 997, that added together give a palindrome (7990997).

The spelling of 7990000997 in words is "seven billion, nine hundred ninety million, nine hundred ninety-seven", and thus it is an aban number.