104442389 has 2 divisors, whose sum is σ = 104442390. Its totient is φ = 104442388.

The previous prime is 104442343. The next prime is 104442391. The reversal of 104442389 is 983244401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81306289 + 23136100 = 9017^2 + 4810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104442389 is a prime.

Together with 104442391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104442329) 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, 52221194 + 52221195.

It is an arithmetic number, because the mean of its divisors is an integer number (52221195).

Almost surely, 2^104442389 is an apocalyptic number.

It is an amenable number.

104442389 is a deficient number, since it is larger than the sum of its proper divisors (1).

104442389 is an equidigital number, since it uses as much as digits as its factorization.

104442389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 104442389 is about 10219.7059155340. The cubic root of 104442389 is about 470.9327921318.

The spelling of 104442389 in words is "one hundred four million, four hundred forty-two thousand, three hundred eighty-nine".