3901909725 has 120 divisors (see below), whose sum is σ = 8378713728. Its totient is φ = 1758153600.

The previous prime is 3901909709. The next prime is 3901909729. The reversal of 3901909725 is 5279091093.

It is a happy number.

3901909725 is a `hidden beast` number, since 390 + 190 + 9 + 72 + 5 = 666.

It is not a de Polignac number, because 3901909725 - 2⁴ = 3901909709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3901909729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1004487 + ... + 1008363.

Almost surely, 2^3901909725 is an apocalyptic number.

3901909725 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3901909725 is an abundant number, since it is smaller than the sum of its proper divisors (4476804003).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3901909725 is a wasteful number, since it uses less digits than its factorization.

3901909725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977 (or 3963 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 3901909725 is about 62465.2681495885. The cubic root of 3901909725 is about 1574.3177997905.

The spelling of 3901909725 in words is "three billion, nine hundred one million, nine hundred nine thousand, seven hundred twenty-five".