725759173 has 2 divisors, whose sum is σ = 725759174. Its totient is φ = 725759172.

The previous prime is 725759159. The next prime is 725759267. The reversal of 725759173 is 371957527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 412008804 + 313750369 = 20298^2 + 17713^2 .

It is a cyclic number.

It is not a de Polignac number, because 725759173 - 2²⁹ = 188888261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (725759143) 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 as a sum of consecutive naturals, namely, 362879586 + 362879587.

It is an arithmetic number, because the mean of its divisors is an integer number (362879587).

Almost surely, 2^725759173 is an apocalyptic number.

It is an amenable number.

725759173 is a deficient number, since it is larger than the sum of its proper divisors (1).

725759173 is an equidigital number, since it uses as much as digits as its factorization.

725759173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 463050, while the sum is 46.

The square root of 725759173 is about 26939.9178358064. The cubic root of 725759173 is about 898.6643451247.

It can be divided in two parts, 7257 and 59173, that added together give a triangular number (66430 = T₃₆₄).

The spelling of 725759173 in words is "seven hundred twenty-five million, seven hundred fifty-nine thousand, one hundred seventy-three".