861834041 has 2 divisors, whose sum is σ = 861834042. Its totient is φ = 861834040.

The previous prime is 861834037. The next prime is 861834109. The reversal of 861834041 is 140438168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 797497600 + 64336441 = 28240^2 + 8021^2 .

It is a cyclic number.

It is not a de Polignac number, because 861834041 - 2² = 861834037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 861833992 and 861834010.

It is not a weakly prime, because it can be changed into another prime (861834011) 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, 430917020 + 430917021.

It is an arithmetic number, because the mean of its divisors is an integer number (430917021).

Almost surely, 2^861834041 is an apocalyptic number.

It is an amenable number.

861834041 is a deficient number, since it is larger than the sum of its proper divisors (1).

861834041 is an equidigital number, since it uses as much as digits as its factorization.

861834041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 861834041 is about 29357.0100827724. The cubic root of 861834041 is about 951.6440749975.

The spelling of 861834041 in words is "eight hundred sixty-one million, eight hundred thirty-four thousand, forty-one".