8731997 has 4 divisors (see below), whose sum is σ = 8744736. Its totient is φ = 8719260.

The previous prime is 8731993. The next prime is 8732023. The reversal of 8731997 is 7991378.

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 8731997 - 2² = 8731993 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 (8731991) 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, 5279 + ... + 6732.

It is an arithmetic number, because the mean of its divisors is an integer number (2186184).

Almost surely, 2^8731997 is an apocalyptic number.

It is an amenable number.

8731997 is a deficient number, since it is larger than the sum of its proper divisors (12739).

8731997 is a wasteful number, since it uses less digits than its factorization.

8731997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12738.

The product of its digits is 95256, while the sum is 44.

The square root of 8731997 is about 2954.9952622635. The cubic root of 8731997 is about 205.9228431944.

The spelling of 8731997 in words is "eight million, seven hundred thirty-one thousand, nine hundred ninety-seven".