3947794931 has 2 divisors, whose sum is σ = 3947794932. Its totient is φ = 3947794930.

The previous prime is 3947794919. The next prime is 3947794933. The reversal of 3947794931 is 1394977493.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3947794931 - 2⁶ = 3947794867 is a prime.

It is a super-2 number, since 2×3947794931² = 31170169634458589522, which contains 22 as substring.

Together with 3947794933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3947794933) 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 as a sum of consecutive naturals, namely, 1973897465 + 1973897466.

It is an arithmetic number, because the mean of its divisors is an integer number (1973897466).

Almost surely, 2^3947794931 is an apocalyptic number.

3947794931 is a deficient number, since it is larger than the sum of its proper divisors (1).

3947794931 is an equidigital number, since it uses as much as digits as its factorization.

3947794931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 56.

The square root of 3947794931 is about 62831.4804138817. The cubic root of 3947794931 is about 1580.4649236673.

The spelling of 3947794931 in words is "three billion, nine hundred forty-seven million, seven hundred ninety-four thousand, nine hundred thirty-one".