172747073 has 2 divisors, whose sum is σ = 172747074. Its totient is φ = 172747072.

The previous prime is 172747061. The next prime is 172747093. The reversal of 172747073 is 370747271.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158055184 + 14691889 = 12572^2 + 3833^2 .

It is a cyclic number.

It is not a de Polignac number, because 172747073 - 2¹⁸ = 172484929 is a prime.

It is not a weakly prime, because it can be changed into another prime (172747033) 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, 86373536 + 86373537.

It is an arithmetic number, because the mean of its divisors is an integer number (86373537).

Almost surely, 2^172747073 is an apocalyptic number.

It is an amenable number.

172747073 is a deficient number, since it is larger than the sum of its proper divisors (1).

172747073 is an equidigital number, since it uses as much as digits as its factorization.

172747073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57624, while the sum is 38.

The square root of 172747073 is about 13143.3280792956. The cubic root of 172747073 is about 556.9337872423.

The spelling of 172747073 in words is "one hundred seventy-two million, seven hundred forty-seven thousand, seventy-three".