172066303 has 2 divisors, whose sum is σ = 172066304. Its totient is φ = 172066302.

The previous prime is 172066291. The next prime is 172066313. The reversal of 172066303 is 303660271.

It is a strong prime.

It is an emirp because it is prime and its reverse (303660271) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172066303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172066313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86033151 + 86033152.

It is an arithmetic number, because the mean of its divisors is an integer number (86033152).

Almost surely, 2^172066303 is an apocalyptic number.

172066303 is a deficient number, since it is larger than the sum of its proper divisors (1).

172066303 is an equidigital number, since it uses as much as digits as its factorization.

172066303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 172066303 is about 13117.4045832245. The cubic root of 172066303 is about 556.2012269150.

The spelling of 172066303 in words is "one hundred seventy-two million, sixty-six thousand, three hundred three".