3956397715 has 4 divisors (see below), whose sum is σ = 4747677264. Its totient is φ = 3165118168.

The previous prime is 3956397713. The next prime is 3956397733. The reversal of 3956397715 is 5177936593.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5177936593 = 8923 ⋅580291.

It is a cyclic number.

It is not a de Polignac number, because 3956397715 - 2¹ = 3956397713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3956397713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395639767 + ... + 395639776.

It is an arithmetic number, because the mean of its divisors is an integer number (1186919316).

Almost surely, 2^3956397715 is an apocalyptic number.

3956397715 is a deficient number, since it is larger than the sum of its proper divisors (791279549).

3956397715 is an equidigital number, since it uses as much as digits as its factorization.

3956397715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791279548.

The product of its digits is 5358150, while the sum is 55.

The square root of 3956397715 is about 62899.9023449162. The cubic root of 3956397715 is about 1581.6121070443.

The spelling of 3956397715 in words is "three billion, nine hundred fifty-six million, three hundred ninety-seven thousand, seven hundred fifteen".