849131671109 has 2 divisors, whose sum is σ = 849131671110. Its totient is φ = 849131671108.

The previous prime is 849131671049. The next prime is 849131671133. The reversal of 849131671109 is 901176131948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 791868616900 + 57263054209 = 889870^2 + 239297^2 .

It is a cyclic number.

It is not a de Polignac number, because 849131671109 - 2⁸ = 849131670853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849131671159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424565835554 + 424565835555.

It is an arithmetic number, because the mean of its divisors is an integer number (424565835555).

Almost surely, 2^849131671109 is an apocalyptic number.

It is an amenable number.

849131671109 is a deficient number, since it is larger than the sum of its proper divisors (1).

849131671109 is an equidigital number, since it uses as much as digits as its factorization.

849131671109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 849131671109 in words is "eight hundred forty-nine billion, one hundred thirty-one million, six hundred seventy-one thousand, one hundred nine".