431603505623 has 4 divisors (see below), whose sum is σ = 431614210608. Its totient is φ = 431592800640.

The previous prime is 431603505499. The next prime is 431603505643. The reversal of 431603505623 is 326505306134.

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 431603505623 - 2⁸ = 431603505367 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 (431603505643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5291786 + ... + 5372727.

It is an arithmetic number, because the mean of its divisors is an integer number (107903552652).

Almost surely, 2^431603505623 is an apocalyptic number.

431603505623 is a deficient number, since it is larger than the sum of its proper divisors (10704985).

431603505623 is a wasteful number, since it uses less digits than its factorization.

431603505623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10704984.

The product of its (nonzero) digits is 194400, while the sum is 38.

The spelling of 431603505623 in words is "four hundred thirty-one billion, six hundred three million, five hundred five thousand, six hundred twenty-three".