849881653 has 2 divisors, whose sum is σ = 849881654. Its totient is φ = 849881652.

The previous prime is 849881651. The next prime is 849881657. The reversal of 849881653 is 356188948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 820364164 + 29517489 = 28642^2 + 5433^2 .

It is a cyclic number.

It is not a de Polignac number, because 849881653 - 2¹ = 849881651 is a prime.

Together with 849881651, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 849881653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849881651) 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, 424940826 + 424940827.

It is an arithmetic number, because the mean of its divisors is an integer number (424940827).

Almost surely, 2^849881653 is an apocalyptic number.

It is an amenable number.

849881653 is a deficient number, since it is larger than the sum of its proper divisors (1).

849881653 is an equidigital number, since it uses as much as digits as its factorization.

849881653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 52.

The square root of 849881653 is about 29152.7297692686. The cubic root of 849881653 is about 947.2242718693.

The spelling of 849881653 in words is "eight hundred forty-nine million, eight hundred eighty-one thousand, six hundred fifty-three".