104840861 has 2 divisors, whose sum is σ = 104840862. Its totient is φ = 104840860.

The previous prime is 104840851. The next prime is 104840891. The reversal of 104840861 is 168048401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103652761 + 1188100 = 10181^2 + 1090^2 .

It is an emirp because it is prime and its reverse (168048401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104840861 - 2¹⁰ = 104839837 is a prime.

It is a super-2 number, since 2×104840861² = 21983212270442642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104840851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52420430 + 52420431.

It is an arithmetic number, because the mean of its divisors is an integer number (52420431).

Almost surely, 2^104840861 is an apocalyptic number.

It is an amenable number.

104840861 is a deficient number, since it is larger than the sum of its proper divisors (1).

104840861 is an equidigital number, since it uses as much as digits as its factorization.

104840861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 104840861 is about 10239.1826333941. The cubic root of 104840861 is about 471.5309381228.

The spelling of 104840861 in words is "one hundred four million, eight hundred forty thousand, eight hundred sixty-one".