673254409 has 4 divisors (see below), whose sum is σ = 673501716. Its totient is φ = 673007104.

The previous prime is 673254403. The next prime is 673254431. The reversal of 673254409 is 904452376.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 383063184 + 290191225 = 19572^2 + 17035^2 .

It is a cyclic number.

It is not a de Polignac number, because 673254409 - 2²¹ = 671157257 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673254403) 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, 119524 + ... + 125029.

It is an arithmetic number, because the mean of its divisors is an integer number (168375429).

Almost surely, 2^673254409 is an apocalyptic number.

It is an amenable number.

673254409 is a deficient number, since it is larger than the sum of its proper divisors (247307).

673254409 is a wasteful number, since it uses less digits than its factorization.

673254409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247306.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 673254409 is about 25947.1464519704. The cubic root of 673254409 is about 876.4484999452.

The spelling of 673254409 in words is "six hundred seventy-three million, two hundred fifty-four thousand, four hundred nine".