104681921 has 2 divisors, whose sum is σ = 104681922. Its totient is φ = 104681920.

The previous prime is 104681881. The next prime is 104681977. The reversal of 104681921 is 129186401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53129521 + 51552400 = 7289^2 + 7180^2 .

It is a cyclic number.

It is not a de Polignac number, because 104681921 - 2¹⁴ = 104665537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (104681981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52340960 + 52340961.

It is an arithmetic number, because the mean of its divisors is an integer number (52340961).

Almost surely, 2^104681921 is an apocalyptic number.

It is an amenable number.

104681921 is a deficient number, since it is larger than the sum of its proper divisors (1).

104681921 is an equidigital number, since it uses as much as digits as its factorization.

104681921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 104681921 is about 10231.4183278762. The cubic root of 104681921 is about 471.2925354266.

The spelling of 104681921 in words is "one hundred four million, six hundred eighty-one thousand, nine hundred twenty-one".