3938979251 has 16 divisors (see below), whose sum is σ = 4045137408. Its totient is φ = 3834465600.

The previous prime is 3938979227. The next prime is 3938979269. The reversal of 3938979251 is 1529798393.

It is a happy number.

3938979251 is digitally balanced in base 2, 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 3938979251 - 2²² = 3934784947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3938979221) 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, 3590135 + ... + 3591231.

It is an arithmetic number, because the mean of its divisors is an integer number (252821088).

Almost surely, 2^3938979251 is an apocalyptic number.

3938979251 is a deficient number, since it is larger than the sum of its proper divisors (106158157).

3938979251 is a wasteful number, since it uses less digits than its factorization.

3938979251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762.

The product of its digits is 3674160, while the sum is 56.

The square root of 3938979251 is about 62761.2878373285. The cubic root of 3938979251 is about 1579.2876202910.

The spelling of 3938979251 in words is "three billion, nine hundred thirty-eight million, nine hundred seventy-nine thousand, two hundred fifty-one".