3911989825 has 12 divisors (see below), whose sum is σ = 4872057340. Its totient is φ = 3115920960.

The previous prime is 3911989817. The next prime is 3911989831. The reversal of 3911989825 is 5289891193.

It can be written as a sum of positive squares in 6 ways, for example, as 141538609 + 3770451216 = 11897^2 + 61404^2 .

It is not a de Polignac number, because 3911989825 - 2³ = 3911989817 is a prime.

It is a super-3 number, since 3×3911989825³ (a number of 30 digits) contains 333 as substring.

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, 335934 + ... + 347383.

Almost surely, 2^3911989825 is an apocalyptic number.

It is an amenable number.

3911989825 is a deficient number, since it is larger than the sum of its proper divisors (960067515).

3911989825 is a wasteful number, since it uses less digits than its factorization.

3911989825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683556 (or 683551 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 55.

The square root of 3911989825 is about 62545.9017442390. The cubic root of 3911989825 is about 1575.6723189970.

The spelling of 3911989825 in words is "three billion, nine hundred eleven million, nine hundred eighty-nine thousand, eight hundred twenty-five".