16390943 has 4 divisors (see below), whose sum is σ = 16428720. Its totient is φ = 16353168.

The previous prime is 16390937. The next prime is 16390951. The reversal of 16390943 is 34909361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34909361 = 1039 ⋅33599.

It is a cyclic number.

It is not a de Polignac number, because 16390943 - 2⁶ = 16390879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16390903) 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, 18230 + ... + 19107.

It is an arithmetic number, because the mean of its divisors is an integer number (4107180).

Almost surely, 2^16390943 is an apocalyptic number.

16390943 is a deficient number, since it is larger than the sum of its proper divisors (37777).

16390943 is an equidigital number, since it uses as much as digits as its factorization.

16390943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37776.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 16390943 is about 4048.5729584633. The cubic root of 16390943 is about 254.0200399589.

The spelling of 16390943 in words is "sixteen million, three hundred ninety thousand, nine hundred forty-three".