104589981 has 16 divisors (see below), whose sum is σ = 155758720. Its totient is φ = 69361920.

The previous prime is 104589973. The next prime is 104589997. The reversal of 104589981 is 189985401.

It is not a de Polignac number, because 104589981 - 2³ = 104589973 is a prime.

It is a super-2 number, since 2×104589981² = 21878128251160722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104589911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4825 + ... + 15246.

It is an arithmetic number, because the mean of its divisors is an integer number (9734920).

Almost surely, 2^104589981 is an apocalyptic number.

It is an amenable number.

104589981 is a deficient number, since it is larger than the sum of its proper divisors (51168739).

104589981 is a wasteful number, since it uses less digits than its factorization.

104589981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20273 (or 20267 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 104589981 is about 10226.9243177018. The cubic root of 104589981 is about 471.1545194669.

It can be divided in two parts, 104589 and 981, that added together give a triangular number (105570 = T₄₅₉).

The spelling of 104589981 in words is "one hundred four million, five hundred eighty-nine thousand, nine hundred eighty-one".