16009859 has 4 divisors (see below), whose sum is σ = 16057704. Its totient is φ = 15962016.

The previous prime is 16009853. The next prime is 16009879. The reversal of 16009859 is 95890061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95890061 = 2707 ⋅35423.

It is a cyclic number.

It is not a de Polignac number, because 16009859 - 2¹² = 16005763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16009853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23417 + ... + 24090.

It is an arithmetic number, because the mean of its divisors is an integer number (4014426).

Almost surely, 2^16009859 is an apocalyptic number.

16009859 is a deficient number, since it is larger than the sum of its proper divisors (47845).

16009859 is an equidigital number, since it uses as much as digits as its factorization.

16009859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47844.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 16009859 is about 4001.2321852149. The cubic root of 16009859 is about 252.0359558588.

The spelling of 16009859 in words is "sixteen million, nine thousand, eight hundred fifty-nine".