23421109 has 4 divisors (see below), whose sum is σ = 23592204. Its totient is φ = 23250016.

The previous prime is 23421059. The next prime is 23421113. The reversal of 23421109 is 90112432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5654884 + 17766225 = 2378^2 + 4215^2 .

It is a cyclic number.

It is not a de Polignac number, because 23421109 - 2¹¹ = 23419061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23421109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23421149) 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, 85342 + ... + 85615.

It is an arithmetic number, because the mean of its divisors is an integer number (5898051).

Almost surely, 2^23421109 is an apocalyptic number.

It is an amenable number.

23421109 is a deficient number, since it is larger than the sum of its proper divisors (171095).

23421109 is a wasteful number, since it uses less digits than its factorization.

23421109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171094.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 23421109 is about 4839.5360314807. The cubic root of 23421109 is about 286.1118321519. Note that the first 3 decimals are identical.

The spelling of 23421109 in words is "twenty-three million, four hundred twenty-one thousand, one hundred nine".