23781343 has 4 divisors (see below), whose sum is σ = 24424120. Its totient is φ = 23138568.

The previous prime is 23781341. The next prime is 23781349. The reversal of 23781343 is 34318732.

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 23781343 - 2¹ = 23781341 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 (23781341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321333 + ... + 321406.

It is an arithmetic number, because the mean of its divisors is an integer number (6106030).

Almost surely, 2^23781343 is an apocalyptic number.

23781343 is a deficient number, since it is larger than the sum of its proper divisors (642777).

23781343 is an equidigital number, since it uses as much as digits as its factorization.

23781343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642776.

The product of its digits is 12096, while the sum is 31.

The square root of 23781343 is about 4876.6118361010. The cubic root of 23781343 is about 287.5712458591.

It can be divided in two parts, 2378 and 1343, that added together give a square (3721 = 61²).

The spelling of 23781343 in words is "twenty-three million, seven hundred eighty-one thousand, three hundred forty-three".