104001989 has 16 divisors (see below), whose sum is σ = 128529408. Its totient is φ = 81948672.

The previous prime is 104001979. The next prime is 104002001. The reversal of 104001989 is 989100401.

It is not a de Polignac number, because 104001989 - 2²⁰ = 102953413 is a prime.

It is a super-2 number, since 2×104001989² = 21632827431912242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104001949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21164 + ... + 25610.

It is an arithmetic number, because the mean of its divisors is an integer number (8033088).

Almost surely, 2^104001989 is an apocalyptic number.

It is an amenable number.

104001989 is a deficient number, since it is larger than the sum of its proper divisors (24527419).

104001989 is a wasteful number, since it uses less digits than its factorization.

104001989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4724.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 104001989 is about 10198.1365454675. The cubic root of 104001989 is about 470.2699354768.

The spelling of 104001989 in words is "one hundred four million, one thousand, nine hundred eighty-nine".