23721983 has 4 divisors (see below), whose sum is σ = 23769648. Its totient is φ = 23674320.

The previous prime is 23721979. The next prime is 23721991. The reversal of 23721983 is 38912732.

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 23721983 - 2² = 23721979 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 (23721923) 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, 23078 + ... + 24083.

It is an arithmetic number, because the mean of its divisors is an integer number (5942412).

Almost surely, 2^23721983 is an apocalyptic number.

23721983 is a deficient number, since it is larger than the sum of its proper divisors (47665).

23721983 is an equidigital number, since it uses as much as digits as its factorization.

23721983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47664.

The product of its digits is 18144, while the sum is 35.

The square root of 23721983 is about 4870.5218406245. The cubic root of 23721983 is about 287.3317801045.

The spelling of 23721983 in words is "twenty-three million, seven hundred twenty-one thousand, nine hundred eighty-three".