4431661343 has 2 divisors, whose sum is σ = 4431661344. Its totient is φ = 4431661342.

The previous prime is 4431661331. The next prime is 4431661427. The reversal of 4431661343 is 3431661344.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4431661343 - 2⁶ = 4431661279 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4431661543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2215830671 + 2215830672.

It is an arithmetic number, because the mean of its divisors is an integer number (2215830672).

Almost surely, 2^4431661343 is an apocalyptic number.

4431661343 is a deficient number, since it is larger than the sum of its proper divisors (1).

4431661343 is an equidigital number, since it uses as much as digits as its factorization.

4431661343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 35.

The square root of 4431661343 is about 66570.7243688996. The cubic root of 4431661343 is about 1642.5635772686.

Subtracting from 4431661343 its reverse (3431661344), we obtain a palindrome (999999999).

The spelling of 4431661343 in words is "four billion, four hundred thirty-one million, six hundred sixty-one thousand, three hundred forty-three".