23109197 has 4 divisors (see below), whose sum is σ = 23119740. Its totient is φ = 23098656.

The previous prime is 23109193. The next prime is 23109211. The reversal of 23109197 is 79190132.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2579236 + 20529961 = 1606^2 + 4531^2 .

It is a cyclic number.

It is not a de Polignac number, because 23109197 - 2² = 23109193 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 (23109193) 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, 608 + ... + 6825.

It is an arithmetic number, because the mean of its divisors is an integer number (5779935).

Almost surely, 2^23109197 is an apocalyptic number.

It is an amenable number.

23109197 is a deficient number, since it is larger than the sum of its proper divisors (10543).

23109197 is an equidigital number, since it uses as much as digits as its factorization.

23109197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10542.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 23109197 is about 4807.2026169073. The cubic root of 23109197 is about 284.8360481043.

The spelling of 23109197 in words is "twenty-three million, one hundred nine thousand, one hundred ninety-seven".