23393983 has 4 divisors (see below), whose sum is σ = 23564880. Its totient is φ = 23223088.

The previous prime is 23393971. The next prime is 23393987. The reversal of 23393983 is 38939332.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23393983 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23393987) 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, 85243 + ... + 85516.

It is an arithmetic number, because the mean of its divisors is an integer number (5891220).

Almost surely, 2^23393983 is an apocalyptic number.

23393983 is a deficient number, since it is larger than the sum of its proper divisors (170897).

23393983 is a wasteful number, since it uses less digits than its factorization.

23393983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170896.

The product of its digits is 104976, while the sum is 40.

The square root of 23393983 is about 4836.7326781620. The cubic root of 23393983 is about 286.0013325773.

It can be divided in two parts, 23 and 393983, that multiplied together give a palindrome (9061609).

The spelling of 23393983 in words is "twenty-three million, three hundred ninety-three thousand, nine hundred eighty-three".