4431431491 has 2 divisors, whose sum is σ = 4431431492. Its totient is φ = 4431431490.

The previous prime is 4431431483. The next prime is 4431431513. The reversal of 4431431491 is 1941341344.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4431431491 - 2³ = 4431431483 is a prime.

It is not a weakly prime, because it can be changed into another prime (4431431401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2215715745 + 2215715746.

It is an arithmetic number, because the mean of its divisors is an integer number (2215715746).

Almost surely, 2^4431431491 is an apocalyptic number.

4431431491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4431431491 is an equidigital number, since it uses as much as digits as its factorization.

4431431491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 4431431491 is about 66568.9979720290. The cubic root of 4431431491 is about 1642.5351791110.

The spelling of 4431431491 in words is "four billion, four hundred thirty-one million, four hundred thirty-one thousand, four hundred ninety-one".