16943213 has 4 divisors (see below), whose sum is σ = 19363680. Its totient is φ = 14522748.

The previous prime is 16943167. The next prime is 16943219. The reversal of 16943213 is 31234961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31234961 = 317 ⋅98533.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16943213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16943219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1210223 + ... + 1210236.

It is an arithmetic number, because the mean of its divisors is an integer number (4840920).

Almost surely, 2^16943213 is an apocalyptic number.

It is an amenable number.

16943213 is a deficient number, since it is larger than the sum of its proper divisors (2420467).

16943213 is an equidigital number, since it uses as much as digits as its factorization.

16943213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420466.

The product of its digits is 3888, while the sum is 29.

The square root of 16943213 is about 4116.2134298406. The cubic root of 16943213 is about 256.8415350386.

The spelling of 16943213 in words is "sixteen million, nine hundred forty-three thousand, two hundred thirteen".