849231869 has 2 divisors, whose sum is σ = 849231870. Its totient is φ = 849231868.

The previous prime is 849231833. The next prime is 849231883. The reversal of 849231869 is 968132948.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 456676900 + 392554969 = 21370^2 + 19813^2 .

It is a cyclic number.

It is not a de Polignac number, because 849231869 - 2²⁰ = 848183293 is a prime.

It is a super-2 number, since 2×849231869² = 1442389534650466322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849231169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424615934 + 424615935.

It is an arithmetic number, because the mean of its divisors is an integer number (424615935).

Almost surely, 2^849231869 is an apocalyptic number.

It is an amenable number.

849231869 is a deficient number, since it is larger than the sum of its proper divisors (1).

849231869 is an equidigital number, since it uses as much as digits as its factorization.

849231869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 50.

The square root of 849231869 is about 29141.5831587785. The cubic root of 849231869 is about 946.9828076213.

The spelling of 849231869 in words is "eight hundred forty-nine million, two hundred thirty-one thousand, eight hundred sixty-nine".