1999104189 has 16 divisors (see below), whose sum is σ = 2682808128. Its totient is φ = 1324088192.

The previous prime is 1999104181. The next prime is 1999104193. The reversal of 1999104189 is 9814019991.

It is a cyclic number.

It is not a de Polignac number, because 1999104189 - 2³ = 1999104181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999104181) 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, 504514 + ... + 508460.

It is an arithmetic number, because the mean of its divisors is an integer number (167675508).

Almost surely, 2^1999104189 is an apocalyptic number.

It is an amenable number.

1999104189 is a deficient number, since it is larger than the sum of its proper divisors (683703939).

1999104189 is a wasteful number, since it uses less digits than its factorization.

1999104189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004.

The product of its (nonzero) digits is 209952, while the sum is 51.

The square root of 1999104189 is about 44711.3429567934. The cubic root of 1999104189 is about 1259.7329132803.

The spelling of 1999104189 in words is "one billion, nine hundred ninety-nine million, one hundred four thousand, one hundred eighty-nine".