8490665 has 4 divisors (see below), whose sum is σ = 10188804. Its totient is φ = 6792528.

The previous prime is 8490661. The next prime is 8490673. The reversal of 8490665 is 5660948.

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 6697744 + 1792921 = 2588^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 8490665 - 2² = 8490661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8490661) 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, 849062 + ... + 849071.

It is an arithmetic number, because the mean of its divisors is an integer number (2547201).

Almost surely, 2^8490665 is an apocalyptic number.

It is an amenable number.

8490665 is a deficient number, since it is larger than the sum of its proper divisors (1698139).

8490665 is a wasteful number, since it uses less digits than its factorization.

8490665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698138.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 8490665 is about 2913.8745683368. The cubic root of 8490665 is about 204.0080174345.

The spelling of 8490665 in words is "eight million, four hundred ninety thousand, six hundred sixty-five".