3936680725 has 6 divisors (see below), whose sum is σ = 4881484130. Its totient is φ = 3149344560.

The previous prime is 3936680711. The next prime is 3936680753. The reversal of 3936680725 is 5270866393.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 58629649 + 3878051076 = 7657^2 + 62274^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3936680725 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78733590 + ... + 78733639.

Almost surely, 2^3936680725 is an apocalyptic number.

It is an amenable number.

3936680725 is a deficient number, since it is larger than the sum of its proper divisors (944803405).

3936680725 is a wasteful number, since it uses less digits than its factorization.

3936680725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157467239 (or 157467234 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 49.

The square root of 3936680725 is about 62742.9735109837. The cubic root of 3936680725 is about 1578.9803714890.

The spelling of 3936680725 in words is "three billion, nine hundred thirty-six million, six hundred eighty thousand, seven hundred twenty-five".