23009843 has 4 divisors (see below), whose sum is σ = 23752128. Its totient is φ = 22267560.

The previous prime is 23009839. The next prime is 23009873. The reversal of 23009843 is 34890032.

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 23009843 - 2² = 23009839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23009803) 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, 371096 + ... + 371157.

It is an arithmetic number, because the mean of its divisors is an integer number (5938032).

Almost surely, 2^23009843 is an apocalyptic number.

23009843 is a deficient number, since it is larger than the sum of its proper divisors (742285).

23009843 is an equidigital number, since it uses as much as digits as its factorization.

23009843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742284.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 23009843 is about 4796.8576172323. The cubic root of 23009843 is about 284.4272605801.

Adding to 23009843 its reverse (34890032), we get a palindrome (57899875).

The spelling of 23009843 in words is "twenty-three million, nine thousand, eight hundred forty-three".