3639723439 has 6 divisors (see below), whose sum is σ = 4000687880. Its totient is φ = 3308839380.

The previous prime is 3639723427. The next prime is 3639723457. The reversal of 3639723439 is 9343279363.

3639723439 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3639723439 - 2⁵ = 3639723407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3639723392 and 3639723401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639723419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15040059 + ... + 15040300.

Almost surely, 2^3639723439 is an apocalyptic number.

3639723439 is a deficient number, since it is larger than the sum of its proper divisors (360964441).

3639723439 is a wasteful number, since it uses less digits than its factorization.

3639723439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30080381 (or 30080370 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 49.

The square root of 3639723439 is about 60330.1204954872. The cubic root of 3639723439 is about 1538.2353767216.

The spelling of 3639723439 in words is "three billion, six hundred thirty-nine million, seven hundred twenty-three thousand, four hundred thirty-nine".