3659999 has 4 divisors (see below), whose sum is σ = 4182864. Its totient is φ = 3137136.

The previous prime is 3659993. The next prime is 3660011. The reversal of 3659999 is 9999563.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3659999 is a prime.

3659999 is a modest number, since divided by 9999 gives 365 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3659993) 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, 261422 + ... + 261435.

It is an arithmetic number, because the mean of its divisors is an integer number (1045716).

Almost surely, 2^3659999 is an apocalyptic number.

3659999 is a deficient number, since it is larger than the sum of its proper divisors (522865).

3659999 is an equidigital number, since it uses as much as digits as its factorization.

3659999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522864.

The product of its digits is 590490, while the sum is 50.

The square root of 3659999 is about 1913.1123856167. The cubic root of 3659999 is about 154.1086403814.

The spelling of 3659999 in words is "three million, six hundred fifty-nine thousand, nine hundred ninety-nine".