3989725 has 6 divisors (see below), whose sum is σ = 4947290. Its totient is φ = 3191760.

The previous prime is 3989723. The next prime is 3989729. The reversal of 3989725 is 5279893.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 13689 + 3976036 = 117^2 + 1994^2 .

It is not a de Polignac number, because 3989725 - 2¹ = 3989723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79770 + ... + 79819.

Almost surely, 2^3989725 is an apocalyptic number.

It is an amenable number.

3989725 is a deficient number, since it is larger than the sum of its proper divisors (957565).

3989725 is a wasteful number, since it uses less digits than its factorization.

3989725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159599 (or 159594 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The square root of 3989725 is about 1997.4295982587. The cubic root of 3989725 is about 158.6040674328.

The spelling of 3989725 in words is "three million, nine hundred eighty-nine thousand, seven hundred twenty-five".