16291289 has 8 divisors (see below), whose sum is σ = 18701760. Its totient is φ = 13901616.

The previous prime is 16291277. The next prime is 16291313. The reversal of 16291289 is 98219261.

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-16291289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16290289) 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, 3479 + ... + 6684.

It is an arithmetic number, because the mean of its divisors is an integer number (2337720).

Almost surely, 2^16291289 is an apocalyptic number.

It is an amenable number.

16291289 is a deficient number, since it is larger than the sum of its proper divisors (2410471).

16291289 is a wasteful number, since it uses less digits than its factorization.

16291289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10399.

The product of its digits is 15552, while the sum is 38.

The square root of 16291289 is about 4036.2468953224. The cubic root of 16291289 is about 253.5041943319.

The spelling of 16291289 in words is "sixteen million, two hundred ninety-one thousand, two hundred eighty-nine".