23190109 has 4 divisors (see below), whose sum is σ = 23210620. Its totient is φ = 23169600.

The previous prime is 23190103. The next prime is 23190113. The reversal of 23190109 is 90109132.

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 1006009 + 22184100 = 1003^2 + 4710^2 .

It is a cyclic number.

It is not a de Polignac number, because 23190109 - 2²¹ = 21092957 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 (23190103) 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, 8454 + ... + 10855.

It is an arithmetic number, because the mean of its divisors is an integer number (5802655).

Almost surely, 2^23190109 is an apocalyptic number.

It is an amenable number.

23190109 is a deficient number, since it is larger than the sum of its proper divisors (20511).

23190109 is a wasteful number, since it uses less digits than its factorization.

23190109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20510.

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

The square root of 23190109 is about 4815.6109685065. The cubic root of 23190109 is about 285.1680920787.

The spelling of 23190109 in words is "twenty-three million, one hundred ninety thousand, one hundred nine".