16446139 has 4 divisors (see below), whose sum is σ = 16454320. Its totient is φ = 16437960.

The previous prime is 16446121. The next prime is 16446163. The reversal of 16446139 is 93164461.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16446139 - 2⁵ = 16446107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16446239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1249 + ... + 5869.

It is an arithmetic number, because the mean of its divisors is an integer number (4113580).

Almost surely, 2^16446139 is an apocalyptic number.

16446139 is a deficient number, since it is larger than the sum of its proper divisors (8181).

16446139 is an equidigital number, since it uses as much as digits as its factorization.

16446139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8180.

The product of its digits is 15552, while the sum is 34.

The square root of 16446139 is about 4055.3839522294. The cubic root of 16446139 is about 254.3048554044.

The spelling of 16446139 in words is "sixteen million, four hundred forty-six thousand, one hundred thirty-nine".