16859434 has 4 divisors (see below), whose sum is σ = 25289154. Its totient is φ = 8429716.

The previous prime is 16859431. The next prime is 16859471. The reversal of 16859434 is 43495861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12006225 + 4853209 = 3465^2 + 2203^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (16859431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4214857 + ... + 4214860.

Almost surely, 2^16859434 is an apocalyptic number.

16859434 is a deficient number, since it is larger than the sum of its proper divisors (8429720).

16859434 is an equidigital number, since it uses as much as digits as its factorization.

16859434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8429719.

The product of its digits is 103680, while the sum is 40.

The square root of 16859434 is about 4106.0241109862. The cubic root of 16859434 is about 256.4175011155.

The spelling of 16859434 in words is "sixteen million, eight hundred fifty-nine thousand, four hundred thirty-four".