23108509 has 4 divisors (see below), whose sum is σ = 23218240. Its totient is φ = 22998780.

The previous prime is 23108507. The next prime is 23108581. The reversal of 23108509 is 90580132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23108509 - 2¹ = 23108507 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 (23108507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54549 + ... + 54970.

It is an arithmetic number, because the mean of its divisors is an integer number (5804560).

Almost surely, 2^23108509 is an apocalyptic number.

It is an amenable number.

23108509 is a deficient number, since it is larger than the sum of its proper divisors (109731).

23108509 is a wasteful number, since it uses less digits than its factorization.

23108509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109730.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 23108509 is about 4807.1310570859. The cubic root of 23108509 is about 284.8332213921.

The spelling of 23108509 in words is "twenty-three million, one hundred eight thousand, five hundred nine".