172828319 has 2 divisors, whose sum is σ = 172828320. Its totient is φ = 172828318.

The previous prime is 172828301. The next prime is 172828321. The reversal of 172828319 is 913828271.

It is a strong prime.

It is an emirp because it is prime and its reverse (913828271) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172828319 is a prime.

It is a super-2 number, since 2×172828319² = 59739255696731522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 172828321, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172828339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86414159 + 86414160.

It is an arithmetic number, because the mean of its divisors is an integer number (86414160).

Almost surely, 2^172828319 is an apocalyptic number.

172828319 is a deficient number, since it is larger than the sum of its proper divisors (1).

172828319 is an equidigital number, since it uses as much as digits as its factorization.

172828319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 172828319 is about 13146.4184856561. The cubic root of 172828319 is about 557.0210854905.

The spelling of 172828319 in words is "one hundred seventy-two million, eight hundred twenty-eight thousand, three hundred nineteen".