673945447 has 16 divisors (see below), whose sum is σ = 817954560. Its totient is φ = 542408832.

The previous prime is 673945387. The next prime is 673945451. The reversal of 673945447 is 744549376.

It is not a de Polignac number, because 673945447 - 2⁷ = 673945319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 673945447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673945247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7393 + ... + 37450.

It is an arithmetic number, because the mean of its divisors is an integer number (51122160).

Almost surely, 2^673945447 is an apocalyptic number.

673945447 is a deficient number, since it is larger than the sum of its proper divisors (144009113).

673945447 is a wasteful number, since it uses less digits than its factorization.

673945447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44982.

The product of its digits is 2540160, while the sum is 49.

The square root of 673945447 is about 25960.4592987104. The cubic root of 673945447 is about 876.7482638528.

The spelling of 673945447 in words is "six hundred seventy-three million, nine hundred forty-five thousand, four hundred forty-seven".