673217725 has 6 divisors (see below), whose sum is σ = 834790010. Its totient is φ = 538574160.

The previous prime is 673217723. The next prime is 673217737. The reversal of 673217725 is 527712376.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 188293284 + 484924441 = 13722^2 + 22021^2 .

It is not a de Polignac number, because 673217725 - 2¹ = 673217723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673217723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13464330 + ... + 13464379.

Almost surely, 2^673217725 is an apocalyptic number.

It is an amenable number.

673217725 is a deficient number, since it is larger than the sum of its proper divisors (161572285).

673217725 is a wasteful number, since it uses less digits than its factorization.

673217725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26928719 (or 26928714 counting only the distinct ones).

The product of its digits is 123480, while the sum is 40.

The square root of 673217725 is about 25946.4395437987. The cubic root of 673217725 is about 876.4325811383.

The spelling of 673217725 in words is "six hundred seventy-three million, two hundred seventeen thousand, seven hundred twenty-five".