16039943 has 4 divisors (see below), whose sum is σ = 16057728. Its totient is φ = 16022160.

The previous prime is 16039921. The next prime is 16039957. The reversal of 16039943 is 34993061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34993061 = 73 ⋅479357.

It is a cyclic number.

It is not a de Polignac number, because 16039943 - 2⁶ = 16039879 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 (16039913) 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, 7463 + ... + 9368.

It is an arithmetic number, because the mean of its divisors is an integer number (4014432).

Almost surely, 2^16039943 is an apocalyptic number.

16039943 is a deficient number, since it is larger than the sum of its proper divisors (17785).

16039943 is an equidigital number, since it uses as much as digits as its factorization.

16039943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17784.

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

The square root of 16039943 is about 4004.9897627834. The cubic root of 16039943 is about 252.1937233403.

The spelling of 16039943 in words is "sixteen million, thirty-nine thousand, nine hundred forty-three".