849217613 has 2 divisors, whose sum is σ = 849217614. Its totient is φ = 849217612.

The previous prime is 849217561. The next prime is 849217703. The reversal of 849217613 is 316712948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 615188809 + 234028804 = 24803^2 + 15298^2 .

It is a cyclic number.

It is not a de Polignac number, because 849217613 - 2⁶ = 849217549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849217513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424608806 + 424608807.

It is an arithmetic number, because the mean of its divisors is an integer number (424608807).

Almost surely, 2^849217613 is an apocalyptic number.

It is an amenable number.

849217613 is a deficient number, since it is larger than the sum of its proper divisors (1).

849217613 is an equidigital number, since it uses as much as digits as its factorization.

849217613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 849217613 is about 29141.3385588240. The cubic root of 849217613 is about 946.9775086121.

The spelling of 849217613 in words is "eight hundred forty-nine million, two hundred seventeen thousand, six hundred thirteen".