16859149 has 2 divisors, whose sum is σ = 16859150. Its totient is φ = 16859148.

The previous prime is 16859113. The next prime is 16859203. The reversal of 16859149 is 94195861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10125124 + 6734025 = 3182^2 + 2595^2 .

It is a cyclic number.

It is not a de Polignac number, because 16859149 - 2¹⁷ = 16728077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16859749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8429574 + 8429575.

It is an arithmetic number, because the mean of its divisors is an integer number (8429575).

Almost surely, 2^16859149 is an apocalyptic number.

It is an amenable number.

16859149 is a deficient number, since it is larger than the sum of its proper divisors (1).

16859149 is an equidigital number, since it uses as much as digits as its factorization.

16859149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 43.

The square root of 16859149 is about 4105.9894057340. The cubic root of 16859149 is about 256.4160562390.

The spelling of 16859149 in words is "sixteen million, eight hundred fifty-nine thousand, one hundred forty-nine".