673238621 has 8 divisors (see below), whose sum is σ = 734668704. Its totient is φ = 611846320.

The previous prime is 673238611. The next prime is 673238651. The reversal of 673238621 is 126832376.

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

It is a cyclic number.

It is not a de Polignac number, because 673238621 - 2¹⁸ = 672976477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673238611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38366 + ... + 53088.

It is an arithmetic number, because the mean of its divisors is an integer number (91833588).

Almost surely, 2^673238621 is an apocalyptic number.

It is an amenable number.

673238621 is a deficient number, since it is larger than the sum of its proper divisors (61430083).

673238621 is a wasteful number, since it uses less digits than its factorization.

673238621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18891.

The product of its digits is 72576, while the sum is 38.

The square root of 673238621 is about 25946.8422163469. The cubic root of 673238621 is about 876.4416489060.

The spelling of 673238621 in words is "six hundred seventy-three million, two hundred thirty-eight thousand, six hundred twenty-one".