172903287473 has 16 divisors (see below), whose sum is σ = 202668407424. Its totient is φ = 144413082240.

The previous prime is 172903287449. The next prime is 172903287521. The reversal of 172903287473 is 374782309271.

It is not a de Polignac number, because 172903287473 - 2³⁰ = 171829545649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172903287433) 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 15 ways as a sum of consecutive naturals, for example, 126890 + ... + 601587.

It is an arithmetic number, because the mean of its divisors is an integer number (12666775464).

Almost surely, 2^172903287473 is an apocalyptic number.

It is an amenable number.

172903287473 is a deficient number, since it is larger than the sum of its proper divisors (29765119951).

172903287473 is an equidigital number, since it uses as much as digits as its factorization.

172903287473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729352.

The product of its (nonzero) digits is 3556224, while the sum is 53.

The spelling of 172903287473 in words is "one hundred seventy-two billion, nine hundred three million, two hundred eighty-seven thousand, four hundred seventy-three".