16743993 has 8 divisors (see below), whose sum is σ = 25514688. Its totient is φ = 9567984.

The previous prime is 16743983. The next prime is 16744009. The reversal of 16743993 is 39934761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16743993 - 2⁸ = 16743737 is a prime.

It is a super-2 number, since 2×16743993² = 560722603168098, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (16743983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398646 + ... + 398687.

It is an arithmetic number, because the mean of its divisors is an integer number (3189336).

Almost surely, 2^16743993 is an apocalyptic number.

It is an amenable number.

16743993 is a deficient number, since it is larger than the sum of its proper divisors (8770695).

16743993 is an equidigital number, since it uses as much as digits as its factorization.

16743993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797343.

The product of its digits is 122472, while the sum is 42.

The square root of 16743993 is about 4091.9424482756. The cubic root of 16743993 is about 255.8309074196.

The spelling of 16743993 in words is "sixteen million, seven hundred forty-three thousand, nine hundred ninety-three".