104421689 has 2 divisors, whose sum is σ = 104421690. Its totient is φ = 104421688.

The previous prime is 104421677. The next prime is 104421703. The reversal of 104421689 is 986124401.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59799289 + 44622400 = 7733^2 + 6680^2 .

It is a cyclic number.

It is not a de Polignac number, because 104421689 - 2²⁰ = 103373113 is a prime.

It is a super-2 number, since 2×104421689² = 21807778267225442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (104421389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52210844 + 52210845.

It is an arithmetic number, because the mean of its divisors is an integer number (52210845).

Almost surely, 2^104421689 is an apocalyptic number.

It is an amenable number.

104421689 is a deficient number, since it is larger than the sum of its proper divisors (1).

104421689 is an equidigital number, since it uses as much as digits as its factorization.

104421689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 104421689 is about 10218.6931160496. The cubic root of 104421689 is about 470.9016778400.

The spelling of 104421689 in words is "one hundred four million, four hundred twenty-one thousand, six hundred eighty-nine".