3639620231 has 4 divisors (see below), whose sum is σ = 3919591032. Its totient is φ = 3359649432.

The previous prime is 3639620209. The next prime is 3639620269. The reversal of 3639620231 is 1320269363.

3639620231 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3639620231 - 2¹⁸ = 3639358087 is a prime.

It is a super-2 number, since 2×3639620231² = 26493670851808986722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3639620191 and 3639620200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639520231) 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, 139985381 + ... + 139985406.

It is an arithmetic number, because the mean of its divisors is an integer number (979897758).

Almost surely, 2^3639620231 is an apocalyptic number.

3639620231 is a deficient number, since it is larger than the sum of its proper divisors (279970801).

3639620231 is a wasteful number, since it uses less digits than its factorization.

3639620231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279970800.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 3639620231 is about 60329.2651289571. The cubic root of 3639620231 is about 1538.2208371830.

Adding to 3639620231 its reverse (1320269363), we get a palindrome (4959889594).

The spelling of 3639620231 in words is "three billion, six hundred thirty-nine million, six hundred twenty thousand, two hundred thirty-one".