494981663 has 4 divisors (see below), whose sum is σ = 539980008. Its totient is φ = 449983320.

The previous prime is 494981659. The next prime is 494981687. The reversal of 494981663 is 366189494.

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 494981663 - 2² = 494981659 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 (494981623) 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, 22499156 + ... + 22499177.

It is an arithmetic number, because the mean of its divisors is an integer number (134995002).

Almost surely, 2^494981663 is an apocalyptic number.

494981663 is a deficient number, since it is larger than the sum of its proper divisors (44998345).

494981663 is a wasteful number, since it uses less digits than its factorization.

494981663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44998344.

The product of its digits is 1119744, while the sum is 50.

The square root of 494981663 is about 22248.1833640412. The cubic root of 494981663 is about 791.0362212728.

The spelling of 494981663 in words is "four hundred ninety-four million, nine hundred eighty-one thousand, six hundred sixty-three".