23163661 has 4 divisors (see below), whose sum is σ = 23173312. Its totient is φ = 23154012.

The previous prime is 23163659. The next prime is 23163671. The reversal of 23163661 is 16636132.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23163661 - 2¹ = 23163659 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 (23163601) 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, 1900 + ... + 7066.

It is an arithmetic number, because the mean of its divisors is an integer number (5793328).

Almost surely, 2^23163661 is an apocalyptic number.

It is an amenable number.

23163661 is a deficient number, since it is larger than the sum of its proper divisors (9651).

23163661 is an equidigital number, since it uses as much as digits as its factorization.

23163661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9650.

The product of its digits is 3888, while the sum is 28.

The square root of 23163661 is about 4812.8641160955. The cubic root of 23163661 is about 285.0596407450.

Adding to 23163661 its reverse (16636132), we get a palindrome (39799793).

The spelling of 23163661 in words is "twenty-three million, one hundred sixty-three thousand, six hundred sixty-one".