8490997 has 4 divisors (see below), whose sum is σ = 8783820. Its totient is φ = 8198176.

The previous prime is 8490949. The next prime is 8491001. The reversal of 8490997 is 7990948.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1473796 + 7017201 = 1214^2 + 2649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8490997 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 (8490917) 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, 146368 + ... + 146425.

It is an arithmetic number, because the mean of its divisors is an integer number (2195955).

Almost surely, 2^8490997 is an apocalyptic number.

It is an amenable number.

8490997 is a deficient number, since it is larger than the sum of its proper divisors (292823).

8490997 is a wasteful number, since it uses less digits than its factorization.

8490997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292822.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 8490997 is about 2913.9315366014. The cubic root of 8490997 is about 204.0106764244.

The spelling of 8490997 in words is "eight million, four hundred ninety thousand, nine hundred ninety-seven".