673670521 has 4 divisors (see below), whose sum is σ = 677056000. Its totient is φ = 670285044.

The previous prime is 673670497. The next prime is 673670531. The reversal of 673670521 is 125076376.

673670521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 673670521 - 2⁵ = 673670489 is a prime.

It is a super-2 number, since 2×673670521² = 907663941728822882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673670531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1692441 + ... + 1692838.

It is an arithmetic number, because the mean of its divisors is an integer number (169264000).

Almost surely, 2^673670521 is an apocalyptic number.

It is an amenable number.

673670521 is a deficient number, since it is larger than the sum of its proper divisors (3385479).

673670521 is a wasteful number, since it uses less digits than its factorization.

673670521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3385478.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 673670521 is about 25955.1636673707. The cubic root of 673670521 is about 876.6290288425.

The spelling of 673670521 in words is "six hundred seventy-three million, six hundred seventy thousand, five hundred twenty-one".