431116643 has 4 divisors (see below), whose sum is σ = 431563440. Its totient is φ = 430669848.

The previous prime is 431116633. The next prime is 431116649. The reversal of 431116643 is 346611134.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 431116643 - 2⁶ = 431116579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431116649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221948 + ... + 223881.

It is an arithmetic number, because the mean of its divisors is an integer number (107890860).

Almost surely, 2^431116643 is an apocalyptic number.

431116643 is a deficient number, since it is larger than the sum of its proper divisors (446797).

431116643 is an equidigital number, since it uses as much as digits as its factorization.

431116643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446796.

The product of its digits is 5184, while the sum is 29.

The square root of 431116643 is about 20763.3485497884. The cubic root of 431116643 is about 755.4370190396.

Adding to 431116643 its reverse (346611134), we get a palindrome (777727777).

The spelling of 431116643 in words is "four hundred thirty-one million, one hundred sixteen thousand, six hundred forty-three".