172044073 has 2 divisors, whose sum is σ = 172044074. Its totient is φ = 172044072.

The previous prime is 172044011. The next prime is 172044101. The reversal of 172044073 is 370440271.

It is an a-pointer prime, because the next prime (172044101) can be obtained adding 172044073 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125148969 + 46895104 = 11187^2 + 6848^2 .

It is an emirp because it is prime and its reverse (370440271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172044073 - 2⁹ = 172043561 is a prime.

It is not a weakly prime, because it can be changed into another prime (172044673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86022036 + 86022037.

It is an arithmetic number, because the mean of its divisors is an integer number (86022037).

Almost surely, 2^172044073 is an apocalyptic number.

It is an amenable number.

172044073 is a deficient number, since it is larger than the sum of its proper divisors (1).

172044073 is an equidigital number, since it uses as much as digits as its factorization.

172044073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 172044073 is about 13116.5572083531. The cubic root of 172044073 is about 556.1772731918.

The spelling of 172044073 in words is "one hundred seventy-two million, forty-four thousand, seventy-three".