3957469639 has 16 divisors (see below), whose sum is σ = 4075038720. Its totient is φ = 3841992000.

The previous prime is 3957469597. The next prime is 3957469657. The reversal of 3957469639 is 9369647593.

3957469639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3957469639 - 2⁹ = 3957469127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3957469679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1711294 + ... + 1713604.

It is an arithmetic number, because the mean of its divisors is an integer number (254689920).

Almost surely, 2^3957469639 is an apocalyptic number.

3957469639 is a deficient number, since it is larger than the sum of its proper divisors (117569081).

3957469639 is a wasteful number, since it uses less digits than its factorization.

3957469639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742.

The product of its digits is 33067440, while the sum is 61.

The square root of 3957469639 is about 62908.4226395798. The cubic root of 3957469639 is about 1581.7549318233.

The spelling of 3957469639 in words is "three billion, nine hundred fifty-seven million, four hundred sixty-nine thousand, six hundred thirty-nine".