16393983 has 4 divisors (see below), whose sum is σ = 21858648. Its totient is φ = 10929320.

The previous prime is 16393969. The next prime is 16393987. The reversal of 16393983 is 38939361.

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

It is a cyclic number.

It is not a de Polignac number, because 16393983 - 2¹⁶ = 16328447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16393987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2732328 + ... + 2732333.

It is an arithmetic number, because the mean of its divisors is an integer number (5464662).

Almost surely, 2^16393983 is an apocalyptic number.

16393983 is a deficient number, since it is larger than the sum of its proper divisors (5464665).

16393983 is an equidigital number, since it uses as much as digits as its factorization.

16393983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5464664.

The product of its digits is 104976, while the sum is 42.

The square root of 16393983 is about 4048.9483819876. The cubic root of 16393983 is about 254.0357432081.

It can be divided in two parts, 1639398 and 3, that multiplied together give a palindrome (4918194).

The spelling of 16393983 in words is "sixteen million, three hundred ninety-three thousand, nine hundred eighty-three".