104129989 has 8 divisors (see below), whose sum is σ = 106814840. Its totient is φ = 101476800.

The previous prime is 104129983. The next prime is 104129999. The reversal of 104129989 is 989921401.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27217089 + 76912900 = 5217^2 + 8770^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 104129989 - 2⁹ = 104129477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104129983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1182 + ... + 14479.

It is an arithmetic number, because the mean of its divisors is an integer number (13351855).

Almost surely, 2^104129989 is an apocalyptic number.

It is an amenable number.

104129989 is a deficient number, since it is larger than the sum of its proper divisors (2684851).

104129989 is a wasteful number, since it uses less digits than its factorization.

104129989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15831.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 104129989 is about 10204.4102720343. The cubic root of 104129989 is about 470.4627839484.

The spelling of 104129989 in words is "one hundred four million, one hundred twenty-nine thousand, nine hundred eighty-nine".