173687972 has 12 divisors (see below), whose sum is σ = 311367756. Its totient is φ = 84725760.

The previous prime is 173687971. The next prime is 173687993. The reversal of 173687972 is 279786371.

173687972 is digitally balanced in base 3, 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 2 ways, for example, as 87123556 + 86564416 = 9334^2 + 9304^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 173687972.

It is not an unprimeable number, because it can be changed into a prime (173687971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529373 + ... + 529700.

It is an arithmetic number, because the mean of its divisors is an integer number (25947313).

Almost surely, 2^173687972 is an apocalyptic number.

It is an amenable number.

173687972 is a deficient number, since it is larger than the sum of its proper divisors (137679784).

173687972 is a wasteful number, since it uses less digits than its factorization.

173687972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059118 (or 1059116 counting only the distinct ones).

The product of its digits is 889056, while the sum is 50.

The square root of 173687972 is about 13179.0732602866. The cubic root of 173687972 is about 557.9431047277.

The spelling of 173687972 in words is "one hundred seventy-three million, six hundred eighty-seven thousand, nine hundred seventy-two".