16168643 has 2 divisors, whose sum is σ = 16168644. Its totient is φ = 16168642.

The previous prime is 16168591. The next prime is 16168651. The reversal of 16168643 is 34686161.

It is a strong prime.

It is an emirp because it is prime and its reverse (34686161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16168643 - 2¹⁶ = 16103107 is a prime.

It is a super-2 number, since 2×16168643² = 522850032922898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16168543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8084321 + 8084322.

It is an arithmetic number, because the mean of its divisors is an integer number (8084322).

Almost surely, 2^16168643 is an apocalyptic number.

16168643 is a deficient number, since it is larger than the sum of its proper divisors (1).

16168643 is an equidigital number, since it uses as much as digits as its factorization.

16168643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 16168643 is about 4021.0251180514. The cubic root of 16168643 is about 252.8664378587.

The spelling of 16168643 in words is "sixteen million, one hundred sixty-eight thousand, six hundred forty-three".