23406239 has 4 divisors (see below), whose sum is σ = 23427240. Its totient is φ = 23385240.

The previous prime is 23406221. The next prime is 23406259. The reversal of 23406239 is 93260432.

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 23406239 - 2⁸ = 23405983 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 (23406259) 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, 8729 + ... + 11090.

It is an arithmetic number, because the mean of its divisors is an integer number (5856810).

Almost surely, 2^23406239 is an apocalyptic number.

23406239 is a deficient number, since it is larger than the sum of its proper divisors (21001).

23406239 is a wasteful number, since it uses less digits than its factorization.

23406239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21000.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 23406239 is about 4837.9994832575. Note that the first 3 decimals coincide. The cubic root of 23406239 is about 286.0512687850.

The spelling of 23406239 in words is "twenty-three million, four hundred six thousand, two hundred thirty-nine".