849741839 has 2 divisors, whose sum is σ = 849741840. Its totient is φ = 849741838.

The previous prime is 849741833. The next prime is 849741917. The reversal of 849741839 is 938147948.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-849741839 is a prime.

It is a super-2 number, since 2×849741839² = 1444122385894203842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849741833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424870919 + 424870920.

It is an arithmetic number, because the mean of its divisors is an integer number (424870920).

Almost surely, 2^849741839 is an apocalyptic number.

849741839 is a deficient number, since it is larger than the sum of its proper divisors (1).

849741839 is an equidigital number, since it uses as much as digits as its factorization.

849741839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 53.

The square root of 849741839 is about 29150.3317133785. The cubic root of 849741839 is about 947.1723264104.

The spelling of 849741839 in words is "eight hundred forty-nine million, seven hundred forty-one thousand, eight hundred thirty-nine".