16194989 has 8 divisors (see below), whose sum is σ = 16783872. Its totient is φ = 15610320.

The previous prime is 16194979. The next prime is 16194991. The reversal of 16194989 is 98949161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16194989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16194949) 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, 8192 + ... + 9974.

It is an arithmetic number, because the mean of its divisors is an integer number (2097984).

Almost surely, 2^16194989 is an apocalyptic number.

It is an amenable number.

16194989 is a deficient number, since it is larger than the sum of its proper divisors (588883).

16194989 is a wasteful number, since it uses less digits than its factorization.

16194989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107.

The product of its digits is 139968, while the sum is 47.

The square root of 16194989 is about 4024.2998148746. The cubic root of 16194989 is about 253.0037077576.

The spelling of 16194989 in words is "sixteen million, one hundred ninety-four thousand, nine hundred eighty-nine".