673218887 has 16 divisors (see below), whose sum is σ = 818553600. Its totient is φ = 545696640.

The previous prime is 673218883. The next prime is 673218907. The reversal of 673218887 is 788812376.

It is a cyclic number.

It is not a de Polignac number, because 673218887 - 2² = 673218883 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 (673218883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91187 + ... + 98292.

It is an arithmetic number, because the mean of its divisors is an integer number (51159600).

Almost surely, 2^673218887 is an apocalyptic number.

673218887 is a deficient number, since it is larger than the sum of its proper divisors (145334713).

673218887 is a wasteful number, since it uses less digits than its factorization.

673218887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189526.

The product of its digits is 903168, while the sum is 50.

The square root of 673218887 is about 25946.4619360714. The cubic root of 673218887 is about 876.4330853903.

The spelling of 673218887 in words is "six hundred seventy-three million, two hundred eighteen thousand, eight hundred eighty-seven".