3938143925 has 12 divisors (see below), whose sum is σ = 5170551876. Its totient is φ = 2965190400.

The previous prime is 3938143861. The next prime is 3938143967. The reversal of 3938143925 is 5293418393.

It can be written as a sum of positive squares in 6 ways, for example, as 219217636 + 3718926289 = 14806^2 + 60983^2 .

It is not a de Polignac number, because 3938143925 - 2⁶ = 3938143861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3938143925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4632686 + ... + 4633535.

It is an arithmetic number, because the mean of its divisors is an integer number (430879323).

Almost surely, 2^3938143925 is an apocalyptic number.

It is an amenable number.

3938143925 is a deficient number, since it is larger than the sum of its proper divisors (1232407951).

3938143925 is a wasteful number, since it uses less digits than its factorization.

3938143925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9266248 (or 9266243 counting only the distinct ones).

The product of its digits is 699840, while the sum is 47.

The square root of 3938143925 is about 62754.6326975149. The cubic root of 3938143925 is about 1579.1759743381.

The spelling of 3938143925 in words is "three billion, nine hundred thirty-eight million, one hundred forty-three thousand, nine hundred twenty-five".