834121740699581 has 2 divisors, whose sum is σ = 834121740699582. Its totient is φ = 834121740699580.

The previous prime is 834121740699487. The next prime is 834121740699659. The reversal of 834121740699581 is 185996047121438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 803591585031481 + 30530155668100 = 28347691^2 + 5525410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-834121740699581 is a prime.

It is a super-2 number, since 2×834121740699581² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (834121740899581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417060870349790 + 417060870349791.

It is an arithmetic number, because the mean of its divisors is an integer number (417060870349791).

It is a 1-persistent number, because it is pandigital, but 2⋅834121740699581 = 1668243481399162 is not.

Almost surely, 2^{834121740699581} is an apocalyptic number.

It is an amenable number.

834121740699581 is a deficient number, since it is larger than the sum of its proper divisors (1).

834121740699581 is an equidigital number, since it uses as much as digits as its factorization.

834121740699581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104509440, while the sum is 68.

The spelling of 834121740699581 in words is "eight hundred thirty-four trillion, one hundred twenty-one billion, seven hundred forty million, six hundred ninety-nine thousand, five hundred eighty-one".