849781619 has 2 divisors, whose sum is σ = 849781620. Its totient is φ = 849781618.

The previous prime is 849781613. The next prime is 849781657. The reversal of 849781619 is 916187948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 849781619 - 2²⁸ = 581346163 is a prime.

It is a super-2 number, since 2×849781619² = 1444257599980522322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (849781613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424890809 + 424890810.

It is an arithmetic number, because the mean of its divisors is an integer number (424890810).

Almost surely, 2^849781619 is an apocalyptic number.

849781619 is a deficient number, since it is larger than the sum of its proper divisors (1).

849781619 is an equidigital number, since it uses as much as digits as its factorization.

849781619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 53.

The square root of 849781619 is about 29151.0140303901. The cubic root of 849781619 is about 947.1871065572.

The spelling of 849781619 in words is "eight hundred forty-nine million, seven hundred eighty-one thousand, six hundred nineteen".