8791997 has 4 divisors (see below), whose sum is σ = 8830620. Its totient is φ = 8753376.

The previous prime is 8791987. The next prime is 8792027. The reversal of 8791997 is 7991978.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7991978 = 2 ⋅3995989.

It can be written as a sum of positive squares in 2 ways, for example, as 5812921 + 2979076 = 2411^2 + 1726^2 .

It is a cyclic number.

It is not a de Polignac number, because 8791997 - 2⁶ = 8791933 is a prime.

It is a super-2 number, since 2×8791997² = 154598422496018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8791987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18968 + ... + 19425.

It is an arithmetic number, because the mean of its divisors is an integer number (2207655).

Almost surely, 2^8791997 is an apocalyptic number.

It is an amenable number.

8791997 is a deficient number, since it is larger than the sum of its proper divisors (38623).

8791997 is a wasteful number, since it uses less digits than its factorization.

8791997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38622.

The product of its digits is 285768, while the sum is 50.

The square root of 8791997 is about 2965.1301826395. The cubic root of 8791997 is about 206.3934182170.

The spelling of 8791997 in words is "eight million, seven hundred ninety-one thousand, nine hundred ninety-seven".