3664999 has 4 divisors (see below), whose sum is σ = 3946936. Its totient is φ = 3383064.

The previous prime is 3664963. The next prime is 3665017. The reversal of 3664999 is 9994663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9994663 = 7 ⋅1427809.

It is a cyclic number.

It is not a de Polignac number, because 3664999 - 2⁹ = 3664487 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 (3664399) 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, 140949 + ... + 140974.

It is an arithmetic number, because the mean of its divisors is an integer number (986734).

Almost surely, 2^3664999 is an apocalyptic number.

3664999 is a deficient number, since it is larger than the sum of its proper divisors (281937).

3664999 is a wasteful number, since it uses less digits than its factorization.

3664999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281936.

The product of its digits is 314928, while the sum is 46.

The square root of 3664999 is about 1914.4187107318. The cubic root of 3664999 is about 154.1787854445.

The spelling of 3664999 in words is "three million, six hundred sixty-four thousand, nine hundred ninety-nine".