673454389 has 2 divisors, whose sum is σ = 673454390. Its totient is φ = 673454388.

The previous prime is 673454357. The next prime is 673454423. The reversal of 673454389 is 983454376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 673143025 + 311364 = 25945^2 + 558^2 .

It is a cyclic number.

It is not a de Polignac number, because 673454389 - 2⁵ = 673454357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673454339) 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 as a sum of consecutive naturals, namely, 336727194 + 336727195.

It is an arithmetic number, because the mean of its divisors is an integer number (336727195).

Almost surely, 2^673454389 is an apocalyptic number.

It is an amenable number.

673454389 is a deficient number, since it is larger than the sum of its proper divisors (1).

673454389 is an equidigital number, since it uses as much as digits as its factorization.

673454389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 49.

The square root of 673454389 is about 25950.9997687950. Note that the first 3 decimals coincide. The cubic root of 673454389 is about 876.5352699277.

The spelling of 673454389 in words is "six hundred seventy-three million, four hundred fifty-four thousand, three hundred eighty-nine".