16317943 has 4 divisors (see below), whose sum is σ = 17277840. Its totient is φ = 15358048.

The previous prime is 16317929. The next prime is 16317947. The reversal of 16317943 is 34971361.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16317943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16317899 and 16317908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16317947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479923 + ... + 479956.

It is an arithmetic number, because the mean of its divisors is an integer number (4319460).

Almost surely, 2^16317943 is an apocalyptic number.

16317943 is a deficient number, since it is larger than the sum of its proper divisors (959897).

16317943 is an equidigital number, since it uses as much as digits as its factorization.

16317943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959896.

The product of its digits is 13608, while the sum is 34.

The square root of 16317943 is about 4039.5473756350. The cubic root of 16317943 is about 253.6423708175.

The spelling of 16317943 in words is "sixteen million, three hundred seventeen thousand, nine hundred forty-three".