673745018 has 8 divisors (see below), whose sum is σ = 1010759412. Its totient is φ = 336825216.

The previous prime is 673744999. The next prime is 673745021. The reversal of 673745018 is 810547376.

It can be written as a sum of positive squares in 2 ways, for example, as 658589569 + 15155449 = 25663^2 + 3893^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1805 + ... + 36752.

Almost surely, 2^673745018 is an apocalyptic number.

673745018 is a deficient number, since it is larger than the sum of its proper divisors (337014394).

673745018 is a wasteful number, since it uses less digits than its factorization.

673745018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47296.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 673745018 is about 25956.5987371227. The cubic root of 673745018 is about 876.6613412879.

The spelling of 673745018 in words is "six hundred seventy-three million, seven hundred forty-five thousand, eighteen".