431621663 has 8 divisors (see below), whose sum is σ = 476534016. Its totient is φ = 387655000.

The previous prime is 431621627. The next prime is 431621669. The reversal of 431621663 is 366126134.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 431621663 - 2⁶ = 431621599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431621669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235463 + ... + 237288.

It is an arithmetic number, because the mean of its divisors is an integer number (59566752).

Almost surely, 2^431621663 is an apocalyptic number.

431621663 is a deficient number, since it is larger than the sum of its proper divisors (44912353).

431621663 is a wasteful number, since it uses less digits than its factorization.

431621663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472845.

The product of its digits is 15552, while the sum is 32.

The square root of 431621663 is about 20775.5063235532. The cubic root of 431621663 is about 755.7318827276.

Adding to 431621663 its reverse (366126134), we get a palindrome (797747797).

The spelling of 431621663 in words is "four hundred thirty-one million, six hundred twenty-one thousand, six hundred sixty-three".