3639399 has 4 divisors (see below), whose sum is σ = 4852536. Its totient is φ = 2426264.

The previous prime is 3639397. The next prime is 3639403. The reversal of 3639399 is 9939363.

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

It is a cyclic number.

It is not a de Polignac number, because 3639399 - 2¹ = 3639397 is a prime.

It is a D-number.

3639399 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3639399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639397) 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, 606564 + ... + 606569.

It is an arithmetic number, because the mean of its divisors is an integer number (1213134).

Almost surely, 2^3639399 is an apocalyptic number.

3639399 is a deficient number, since it is larger than the sum of its proper divisors (1213137).

3639399 is a wasteful number, since it uses less digits than its factorization.

3639399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213136.

The product of its digits is 118098, while the sum is 42.

The square root of 3639399 is about 1907.7208915352. The cubic root of 3639399 is about 153.8189670101.

The spelling of 3639399 in words is "three million, six hundred thirty-nine thousand, three hundred ninety-nine".