23113661 has 4 divisors (see below), whose sum is σ = 23651232. Its totient is φ = 22576092.

The previous prime is 23113639. The next prime is 23113669. The reversal of 23113661 is 16631132.

It is a happy number.

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 23113661 - 2¹⁰ = 23112637 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 (23113669) 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, 268721 + ... + 268806.

It is an arithmetic number, because the mean of its divisors is an integer number (5912808).

Almost surely, 2^23113661 is an apocalyptic number.

It is an amenable number.

23113661 is a deficient number, since it is larger than the sum of its proper divisors (537571).

23113661 is an equidigital number, since it uses as much as digits as its factorization.

23113661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537570.

The product of its digits is 648, while the sum is 23.

The square root of 23113661 is about 4807.6668977790. Note that the first 3 decimals coincide. The cubic root of 23113661 is about 284.8543875019.

Adding to 23113661 its reverse (16631132), we get a palindrome (39744793).

The spelling of 23113661 in words is "twenty-three million, one hundred thirteen thousand, six hundred sixty-one".