849066917 has 2 divisors, whose sum is σ = 849066918. Its totient is φ = 849066916.

The previous prime is 849066893. The next prime is 849066923. The reversal of 849066917 is 719660948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 757405441 + 91661476 = 27521^2 + 9574^2 .

It is a cyclic number.

It is not a de Polignac number, because 849066917 - 2¹⁶ = 849001381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849066017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424533458 + 424533459.

It is an arithmetic number, because the mean of its divisors is an integer number (424533459).

Almost surely, 2^849066917 is an apocalyptic number.

It is an amenable number.

849066917 is a deficient number, since it is larger than the sum of its proper divisors (1).

849066917 is an equidigital number, since it uses as much as digits as its factorization.

849066917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 849066917 is about 29138.7528387884. The cubic root of 849066917 is about 946.9214907111.

The spelling of 849066917 in words is "eight hundred forty-nine million, sixty-six thousand, nine hundred seventeen".