16443117 has 12 divisors (see below), whose sum is σ = 23846940. Its totient is φ = 10917888.

The previous prime is 16443109. The next prime is 16443121. The reversal of 16443117 is 71134461.

It is a happy number.

16443117 is a `hidden beast` number, since 1 + 644 + 3 + 1 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10361961 + 6081156 = 3219^2 + 2466^2 .

It is not a de Polignac number, because 16443117 - 2³ = 16443109 is a prime.

It is a super-3 number, since 3×16443117³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16443127) 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 11 ways as a sum of consecutive naturals, for example, 1242 + ... + 5867.

It is an arithmetic number, because the mean of its divisors is an integer number (1987245).

Almost surely, 2^16443117 is an apocalyptic number.

It is an amenable number.

16443117 is a deficient number, since it is larger than the sum of its proper divisors (7403823).

16443117 is a wasteful number, since it uses less digits than its factorization.

16443117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7372 (or 7369 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 16443117 is about 4055.0113440039. The cubic root of 16443117 is about 254.2892781647.

Adding to 16443117 its reverse (71134461), we get a palindrome (87577578).

It can be divided in two parts, 1644 and 3117, that added together give a square (4761 = 69²).

The spelling of 16443117 in words is "sixteen million, four hundred forty-three thousand, one hundred seventeen".