673421135 has 4 divisors (see below), whose sum is σ = 808105368. Its totient is φ = 538736904.

The previous prime is 673421129. The next prime is 673421137. The reversal of 673421135 is 531124376.

673421135 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.

It is a cyclic number.

It is not a de Polignac number, because 673421135 - 2¹⁴ = 673404751 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 (673421137) 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, 67342109 + ... + 67342118.

It is an arithmetic number, because the mean of its divisors is an integer number (202026342).

Almost surely, 2^673421135 is an apocalyptic number.

673421135 is a deficient number, since it is larger than the sum of its proper divisors (134684233).

673421135 is a wasteful number, since it uses less digits than its factorization.

673421135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134684232.

The product of its digits is 15120, while the sum is 32.

The square root of 673421135 is about 25950.3590533927. The cubic root of 673421135 is about 876.5208424306.

The spelling of 673421135 in words is "six hundred seventy-three million, four hundred twenty-one thousand, one hundred thirty-five".