673246809 has 35 divisors (see below), whose sum is σ = 1043055365. Its totient is φ = 434352780.

The previous prime is 673246799. The next prime is 673246837. The reversal of 673246809 is 908642376.

The square root of 673246809 is 25947.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-673246809 is a prime.

It is a super-2 number, since 2×673246809² = 906522531657364962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673246009) 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 34 ways as a sum of consecutive naturals, for example, 21717624 + ... + 21717654.

Almost surely, 2^673246809 is an apocalyptic number.

673246809 is the 25947-th square number.

673246809 is the 12974-th centered octagonal number.

It is an amenable number.

673246809 is a deficient number, since it is larger than the sum of its proper divisors (369808556).

673246809 is an frugal number, since it uses more digits than its factorization.

673246809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The cubic root of 673246809 is about 876.4452020172.

The spelling of 673246809 in words is "six hundred seventy-three million, two hundred forty-six thousand, eight hundred nine".