3939216625 has 16 divisors (see below), whose sum is σ = 5205330000. Its totient is φ = 2965996800.

The previous prime is 3939216607. The next prime is 3939216643. The reversal of 3939216625 is 5266129393.

It is an interprime number because it is at equal distance from previous prime (3939216607) and next prime (3939216643).

It can be written as a sum of positive squares in 8 ways, for example, as 1062825201 + 2876391424 = 32601^2 + 53632^2 .

It is not a de Polignac number, because 3939216625 - 2¹³ = 3939208433 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 924750 + ... + 928999.

It is an arithmetic number, because the mean of its divisors is an integer number (325333125).

Almost surely, 2^3939216625 is an apocalyptic number.

It is an amenable number.

3939216625 is a deficient number, since it is larger than the sum of its proper divisors (1266113375).

3939216625 is a wasteful number, since it uses less digits than its factorization.

3939216625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853781 (or 1853771 counting only the distinct ones).

The product of its digits is 524880, while the sum is 46.

The square root of 3939216625 is about 62763.1788949540. The cubic root of 3939216625 is about 1579.3193437626.

The spelling of 3939216625 in words is "three billion, nine hundred thirty-nine million, two hundred sixteen thousand, six hundred twenty-five".