172473073 has 2 divisors, whose sum is σ = 172473074. Its totient is φ = 172473072.

The previous prime is 172473053. The next prime is 172473083. The reversal of 172473073 is 370374271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118200384 + 54272689 = 10872^2 + 7367^2 .

It is an emirp because it is prime and its reverse (370374271) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172473073 is a prime.

It is not a weakly prime, because it can be changed into another prime (172473053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86236536 + 86236537.

It is an arithmetic number, because the mean of its divisors is an integer number (86236537).

Almost surely, 2^172473073 is an apocalyptic number.

It is an amenable number.

172473073 is a deficient number, since it is larger than the sum of its proper divisors (1).

172473073 is an equidigital number, since it uses as much as digits as its factorization.

172473073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 34.

The square root of 172473073 is about 13132.9004031859. The cubic root of 172473073 is about 556.6391742232.

The spelling of 172473073 in words is "one hundred seventy-two million, four hundred seventy-three thousand, seventy-three".