172928227 has 2 divisors, whose sum is σ = 172928228. Its totient is φ = 172928226.

The previous prime is 172928221. The next prime is 172928263. The reversal of 172928227 is 722829271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172928227 - 2¹¹ = 172926179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172928227.

It is not a weakly prime, because it can be changed into another prime (172928221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86464113 + 86464114.

It is an arithmetic number, because the mean of its divisors is an integer number (86464114).

Almost surely, 2^172928227 is an apocalyptic number.

172928227 is a deficient number, since it is larger than the sum of its proper divisors (1).

172928227 is an equidigital number, since it uses as much as digits as its factorization.

172928227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 172928227 is about 13150.2177548511. The cubic root of 172928227 is about 557.1283984257.

The spelling of 172928227 in words is "one hundred seventy-two million, nine hundred twenty-eight thousand, two hundred twenty-seven".