3920292657 has 6 divisors (see below), whose sum is σ = 5662644962. Its totient is φ = 2613528432.

The previous prime is 3920292631. The next prime is 3920292689. The reversal of 3920292657 is 7562920293.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2126685456 + 1793607201 = 46116^2 + 42351^2 .

It is not a de Polignac number, because 3920292657 - 2²³ = 3911904049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3920292557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217794028 + ... + 217794045.

Almost surely, 2^3920292657 is an apocalyptic number.

It is an amenable number.

3920292657 is a deficient number, since it is larger than the sum of its proper divisors (1742352305).

3920292657 is a wasteful number, since it uses less digits than its factorization.

3920292657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435588079 (or 435588076 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 3920292657 is about 62612.2404726105. The cubic root of 3920292657 is about 1576.7862702548.

The spelling of 3920292657 in words is "three billion, nine hundred twenty million, two hundred ninety-two thousand, six hundred fifty-seven".