3639139 has 16 divisors (see below), whose sum is σ = 4494528. Its totient is φ = 2875392.

The previous prime is 3639109. The next prime is 3639143. The reversal of 3639139 is 9319363.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3639139 - 2⁵ = 3639107 is a prime.

It is a super-3 number, since 3×3639139³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

3639139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3639109) 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 15 ways as a sum of consecutive naturals, for example, 6019 + ... + 6595.

It is an arithmetic number, because the mean of its divisors is an integer number (280908).

Almost surely, 2^3639139 is an apocalyptic number.

3639139 is a deficient number, since it is larger than the sum of its proper divisors (855389).

3639139 is a wasteful number, since it uses less digits than its factorization.

3639139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654.

The product of its digits is 13122, while the sum is 34.

The square root of 3639139 is about 1907.6527461779. The cubic root of 3639139 is about 153.8153039617.

The spelling of 3639139 in words is "three million, six hundred thirty-nine thousand, one hundred thirty-nine".