172650217 has 2 divisors, whose sum is σ = 172650218. Its totient is φ = 172650216.

The previous prime is 172650193. The next prime is 172650227. The reversal of 172650217 is 712056271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167547136 + 5103081 = 12944^2 + 2259^2 .

It is a cyclic number.

It is not a de Polignac number, because 172650217 - 2¹¹ = 172648169 is a prime.

It is not a weakly prime, because it can be changed into another prime (172650227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86325108 + 86325109.

It is an arithmetic number, because the mean of its divisors is an integer number (86325109).

Almost surely, 2^172650217 is an apocalyptic number.

It is an amenable number.

172650217 is a deficient number, since it is larger than the sum of its proper divisors (1).

172650217 is an equidigital number, since it uses as much as digits as its factorization.

172650217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 172650217 is about 13139.6429555753. The cubic root of 172650217 is about 556.8296803871.

The spelling of 172650217 in words is "one hundred seventy-two million, six hundred fifty thousand, two hundred seventeen".