3927374257 has 4 divisors (see below), whose sum is σ = 3927502180. Its totient is φ = 3927246336.

The previous prime is 3927374201. The next prime is 3927374261. The reversal of 3927374257 is 7524737293.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7524737293 = 23 ⋅327162491.

It can be written as a sum of positive squares in 2 ways, for example, as 152992161 + 3774382096 = 12369^2 + 61436^2 .

It is a 3-Lehmer number, since φ(3927374257) divides (3927374257-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3927374257 is a prime.

It is a deceptive number, since it divides R_3927374256.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3927374257.

It is not an unprimeable number, because it can be changed into a prime (3927371257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12793 + ... + 89545.

It is an arithmetic number, because the mean of its divisors is an integer number (981875545).

Almost surely, 2^3927374257 is an apocalyptic number.

3927374257 is the 51169-th pentagonal number.

It is an amenable number.

3927374257 is a deficient number, since it is larger than the sum of its proper divisors (127923).

3927374257 is an equidigital number, since it uses as much as digits as its factorization.

3927374257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127922.

The product of its digits is 2222640, while the sum is 49.

The square root of 3927374257 is about 62668.7661997586. The cubic root of 3927374257 is about 1577.7351324836.

The spelling of 3927374257 in words is "three billion, nine hundred twenty-seven million, three hundred seventy-four thousand, two hundred fifty-seven".