885172217 has 2 divisors, whose sum is σ = 885172218. Its totient is φ = 885172216.

The previous prime is 885172213. The next prime is 885172283. The reversal of 885172217 is 712271588.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 446730496 + 438441721 = 21136^2 + 20939^2 .

It is a cyclic number.

It is not a de Polignac number, because 885172217 - 2² = 885172213 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (885172213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 442586108 + 442586109.

It is an arithmetic number, because the mean of its divisors is an integer number (442586109).

Almost surely, 2^885172217 is an apocalyptic number.

It is an amenable number.

885172217 is a deficient number, since it is larger than the sum of its proper divisors (1).

885172217 is an equidigital number, since it uses as much as digits as its factorization.

885172217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 41.

The square root of 885172217 is about 29751.8439260494. The cubic root of 885172217 is about 960.1577493228.

The spelling of 885172217 in words is "eight hundred eighty-five million, one hundred seventy-two thousand, two hundred seventeen".