3956475731 has 6 divisors (see below), whose sum is σ = 4284231300. Its totient is φ = 3652131288.

The previous prime is 3956475707. The next prime is 3956475751. The reversal of 3956475731 is 1375746593.

It is not a de Polignac number, because 3956475731 - 2²² = 3952281427 is a prime.

It is a super-2 number, since 2×3956475731² = 31307400419983968722, which contains 22 as substring.

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 3956475731.

It is not an unprimeable number, because it can be changed into a prime (3956475751) 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, 11705381 + ... + 11705718.

It is an arithmetic number, because the mean of its divisors is an integer number (714038550).

Almost surely, 2^3956475731 is an apocalyptic number.

3956475731 is a deficient number, since it is larger than the sum of its proper divisors (327755569).

3956475731 is a wasteful number, since it uses less digits than its factorization.

3956475731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23411125 (or 23411112 counting only the distinct ones).

The product of its digits is 2381400, while the sum is 50.

The square root of 3956475731 is about 62900.5225018044. The cubic root of 3956475731 is about 1581.6225028848.

The spelling of 3956475731 in words is "three billion, nine hundred fifty-six million, four hundred seventy-five thousand, seven hundred thirty-one".