3994767431 has 2 divisors, whose sum is σ = 3994767432. Its totient is φ = 3994767430.

The previous prime is 3994767377. The next prime is 3994767433. The reversal of 3994767431 is 1347674993.

3994767431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3994767431 is a prime.

It is a super-2 number, since 2×3994767431² = 31916333655556679522, which contains 22 as substring.

Together with 3994767433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3994767433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1997383715 + 1997383716.

It is an arithmetic number, because the mean of its divisors is an integer number (1997383716).

Almost surely, 2^3994767431 is an apocalyptic number.

3994767431 is a deficient number, since it is larger than the sum of its proper divisors (1).

3994767431 is an equidigital number, since it uses as much as digits as its factorization.

3994767431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 53.

The square root of 3994767431 is about 63204.1725758672. The cubic root of 3994767431 is about 1586.7085677965.

The spelling of 3994767431 in words is "three billion, nine hundred ninety-four million, seven hundred sixty-seven thousand, four hundred thirty-one".