725571673 has 4 divisors (see below), whose sum is σ = 726795828. Its totient is φ = 724347520.

The previous prime is 725571659. The next prime is 725571733. The reversal of 725571673 is 376175527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 187470864 + 538100809 = 13692^2 + 23197^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725571673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725571653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 611188 + ... + 612373.

It is an arithmetic number, because the mean of its divisors is an integer number (181698957).

Almost surely, 2^725571673 is an apocalyptic number.

It is an amenable number.

725571673 is a deficient number, since it is larger than the sum of its proper divisors (1224155).

725571673 is a wasteful number, since it uses less digits than its factorization.

725571673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224154.

The product of its digits is 308700, while the sum is 43.

The square root of 725571673 is about 26936.4376449448. The cubic root of 725571673 is about 898.5869484328.

The spelling of 725571673 in words is "seven hundred twenty-five million, five hundred seventy-one thousand, six hundred seventy-three".