673401009 has 4 divisors (see below), whose sum is σ = 897868016. Its totient is φ = 448934004.

The previous prime is 673400993. The next prime is 673401011. The reversal of 673401009 is 900104376.

It is a happy number.

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 not a de Polignac number, because 673401009 - 2⁴ = 673400993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (673401049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112233499 + ... + 112233504.

It is an arithmetic number, because the mean of its divisors is an integer number (224467004).

Almost surely, 2^673401009 is an apocalyptic number.

It is an amenable number.

673401009 is a deficient number, since it is larger than the sum of its proper divisors (224467007).

673401009 is a wasteful number, since it uses less digits than its factorization.

673401009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224467006.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 673401009 is about 25949.9712716604. The cubic root of 673401009 is about 876.5121103840.

The spelling of 673401009 in words is "six hundred seventy-three million, four hundred one thousand, nine".