493631903 has 4 divisors (see below), whose sum is σ = 493840920. Its totient is φ = 493422888.

The previous prime is 493631893. The next prime is 493631969. The reversal of 493631903 is 309136394.

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 493631903 - 2¹⁸ = 493369759 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 (493631993) 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, 100925 + ... + 105702.

It is an arithmetic number, because the mean of its divisors is an integer number (123460230).

Almost surely, 2^493631903 is an apocalyptic number.

493631903 is a deficient number, since it is larger than the sum of its proper divisors (209017).

493631903 is a wasteful number, since it uses less digits than its factorization.

493631903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209016.

The product of its (nonzero) digits is 52488, while the sum is 38.

The square root of 493631903 is about 22217.8284942521. The cubic root of 493631903 is about 790.3165440869.

The spelling of 493631903 in words is "four hundred ninety-three million, six hundred thirty-one thousand, nine hundred three".