894249217 has 2 divisors, whose sum is σ = 894249218. Its totient is φ = 894249216.

The previous prime is 894249179. The next prime is 894249229. The reversal of 894249217 is 712942498.

It is a Cunningham number, because it is equal to 29904²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 894249216 + 1 = 29904^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-894249217 is a prime.

It is a super-2 number, since 2×894249217² = 1599363324210226178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (894249617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447124608 + 447124609.

It is an arithmetic number, because the mean of its divisors is an integer number (447124609).

Almost surely, 2^894249217 is an apocalyptic number.

It is an amenable number.

894249217 is a deficient number, since it is larger than the sum of its proper divisors (1).

894249217 is an equidigital number, since it uses as much as digits as its factorization.

894249217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 894249217 is about 29904.0000167202. Note that the first 4 decimals coincide. The cubic root of 894249217 is about 963.4285742000.

The spelling of 894249217 in words is "eight hundred ninety-four million, two hundred forty-nine thousand, two hundred seventeen".