16387291 has 8 divisors (see below), whose sum is σ = 17845200. Its totient is φ = 14988960.

The previous prime is 16387289. The next prime is 16387321. The reversal of 16387291 is 19278361.

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 16387291 - 2¹ = 16387289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16387291.

It is not an unprimeable number, because it can be changed into a prime (16387391) 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, 14320 + ... + 15421.

It is an arithmetic number, because the mean of its divisors is an integer number (2230650).

Almost surely, 2^16387291 is an apocalyptic number.

16387291 is a deficient number, since it is larger than the sum of its proper divisors (1457909).

16387291 is a wasteful number, since it uses less digits than its factorization.

16387291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29789.

The product of its digits is 18144, while the sum is 37.

The square root of 16387291 is about 4048.1219102196. The cubic root of 16387291 is about 254.0011728303.

The spelling of 16387291 in words is "sixteen million, three hundred eighty-seven thousand, two hundred ninety-one".