3689725 has 12 divisors (see below), whose sum is σ = 4927636. Its totient is φ = 2724480.

The previous prime is 3689723. The next prime is 3689753. The reversal of 3689725 is 5279863.

It can be written as a sum of positive squares in 6 ways, for example, as 710649 + 2979076 = 843^2 + 1726^2 .

It is not a de Polignac number, because 3689725 - 2¹ = 3689723 is a prime.

It is a super-2 number, since 2×3689725² = 27228141151250, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

3689725 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3689723) 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 11 ways as a sum of consecutive naturals, for example, 5352 + ... + 6001.

Almost surely, 2^3689725 is an apocalyptic number.

It is an amenable number.

3689725 is a deficient number, since it is larger than the sum of its proper divisors (1237911).

3689725 is a wasteful number, since it uses less digits than its factorization.

3689725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11376 (or 11371 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 3689725 is about 1920.8656902553. The cubic root of 3689725 is about 154.5247322011.

The spelling of 3689725 in words is "three million, six hundred eighty-nine thousand, seven hundred twenty-five".