23091109 has 4 divisors (see below), whose sum is σ = 23106400. Its totient is φ = 23075820.

The previous prime is 23091091. The next prime is 23091113. The reversal of 23091109 is 90119032.

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 23091109 - 2¹⁹ = 22566821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23091119) 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, 5097 + ... + 8494.

It is an arithmetic number, because the mean of its divisors is an integer number (5776600).

Almost surely, 2^23091109 is an apocalyptic number.

It is an amenable number.

23091109 is a deficient number, since it is larger than the sum of its proper divisors (15291).

23091109 is a wasteful number, since it uses less digits than its factorization.

23091109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15290.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 23091109 is about 4805.3209049969. The cubic root of 23091109 is about 284.7617132087.

The spelling of 23091109 in words is "twenty-three million, ninety-one thousand, one hundred nine".