16743986 has 12 divisors (see below), whose sum is σ = 29216718. Its totient is φ = 7175952.

The previous prime is 16743983. The next prime is 16744009. The reversal of 16743986 is 68934761.

It can be written as a sum of positive squares in only one way, i.e., 10144225 + 6599761 = 3185^2 + 2569^2 .

It is a super-2 number, since 2×16743986² = 560722134336392, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16743983) 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 5 ways as a sum of consecutive naturals, for example, 85331 + ... + 85526.

Almost surely, 2^16743986 is an apocalyptic number.

16743986 is a deficient number, since it is larger than the sum of its proper divisors (12472732).

16743986 is a wasteful number, since it uses less digits than its factorization.

16743986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170873 (or 170866 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 16743986 is about 4091.9415929360. The cubic root of 16743986 is about 255.8308717686.

The spelling of 16743986 in words is "sixteen million, seven hundred forty-three thousand, nine hundred eighty-six".