16389291 has 8 divisors (see below), whose sum is σ = 21897360. Its totient is φ = 10903712.

The previous prime is 16389287. The next prime is 16389293. The reversal of 16389291 is 19298361.

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 16389291 - 2² = 16389287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16389293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3840 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (2737170).

Almost surely, 2^16389291 is an apocalyptic number.

16389291 is a deficient number, since it is larger than the sum of its proper divisors (5508069).

16389291 is a wasteful number, since it uses less digits than its factorization.

16389291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11245.

The product of its digits is 23328, while the sum is 39.

The square root of 16389291 is about 4048.3689308165. The cubic root of 16389291 is about 254.0115056685.

The spelling of 16389291 in words is "sixteen million, three hundred eighty-nine thousand, two hundred ninety-one".