493621918 has 16 divisors (see below), whose sum is σ = 757039104. Its totient is φ = 241287480.

The previous prime is 493621903. The next prime is 493621927. The reversal of 493621918 is 819126394.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99763 + ... + 104593.

It is an arithmetic number, because the mean of its divisors is an integer number (47314944).

Almost surely, 2^493621918 is an apocalyptic number.

493621918 is a deficient number, since it is larger than the sum of its proper divisors (263417186).

493621918 is a wasteful number, since it uses less digits than its factorization.

493621918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5967.

The product of its digits is 93312, while the sum is 43.

The square root of 493621918 is about 22217.6037861872. The cubic root of 493621918 is about 790.3112153093.

The spelling of 493621918 in words is "four hundred ninety-three million, six hundred twenty-one thousand, nine hundred eighteen".