3956795971 has 4 divisors (see below), whose sum is σ = 3956925112. Its totient is φ = 3956666832.

The previous prime is 3956795929. The next prime is 3956795987. The reversal of 3956795971 is 1795976593.

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.

It is a cyclic number.

It is not a de Polignac number, because 3956795971 - 2¹¹ = 3956793923 is a prime.

It is a super-2 number, since 2×3956795971² = 31312468712243665682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3956795071) 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, 10420 + ... + 89566.

It is an arithmetic number, because the mean of its divisors is an integer number (989231278).

Almost surely, 2^3956795971 is an apocalyptic number.

3956795971 is a deficient number, since it is larger than the sum of its proper divisors (129141).

3956795971 is an equidigital number, since it uses as much as digits as its factorization.

3956795971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129140.

The product of its digits is 16074450, while the sum is 61.

The square root of 3956795971 is about 62903.0680571306. The cubic root of 3956795971 is about 1581.6651742890.

The spelling of 3956795971 in words is "three billion, nine hundred fifty-six million, seven hundred ninety-five thousand, nine hundred seventy-one".