673545445 has 8 divisors (see below), whose sum is σ = 836125560. Its totient is φ = 520255680.

The previous prime is 673545407. The next prime is 673545461. The reversal of 673545445 is 544545376.

673545445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 198218241 + 475327204 = 14079^2 + 21802^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 673545445 - 2²¹ = 671448293 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2322426 + ... + 2322715.

It is an arithmetic number, because the mean of its divisors is an integer number (104515695).

Almost surely, 2^673545445 is an apocalyptic number.

It is an amenable number.

673545445 is a deficient number, since it is larger than the sum of its proper divisors (162580115).

673545445 is a wasteful number, since it uses less digits than its factorization.

673545445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645175.

The product of its digits is 1008000, while the sum is 43.

The square root of 673545445 is about 25952.7540927740. The cubic root of 673545445 is about 876.5747728250.

The spelling of 673545445 in words is "six hundred seventy-three million, five hundred forty-five thousand, four hundred forty-five".