673821507 has 4 divisors (see below), whose sum is σ = 898428680. Its totient is φ = 449214336.

The previous prime is 673821493. The next prime is 673821523. The reversal of 673821507 is 705128376.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 673821507 - 2⁶ = 673821443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673821007) 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 3 ways as a sum of consecutive naturals, for example, 112303582 + ... + 112303587.

It is an arithmetic number, because the mean of its divisors is an integer number (224607170).

Almost surely, 2^673821507 is an apocalyptic number.

673821507 is a deficient number, since it is larger than the sum of its proper divisors (224607173).

673821507 is a wasteful number, since it uses less digits than its factorization.

673821507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224607172.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 673821507 is about 25958.0720971339. The cubic root of 673821507 is about 876.6945152682.

The spelling of 673821507 in words is "six hundred seventy-three million, eight hundred twenty-one thousand, five hundred seven".