23640061 has 4 divisors (see below), whose sum is σ = 24040800. Its totient is φ = 23239324.

The previous prime is 23640059. The next prime is 23640083. The reversal of 23640061 is 16004632.

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 23640061 - 2¹ = 23640059 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 (23640961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200281 + ... + 200398.

It is an arithmetic number, because the mean of its divisors is an integer number (6010200).

Almost surely, 2^23640061 is an apocalyptic number.

It is an amenable number.

23640061 is a deficient number, since it is larger than the sum of its proper divisors (400739).

23640061 is an equidigital number, since it uses as much as digits as its factorization.

23640061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400738.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 23640061 is about 4862.1045854650. The cubic root of 23640061 is about 287.0006393977. Note that the first 3 decimals are identical.

Adding to 23640061 its reverse (16004632), we get a palindrome (39644693).

The spelling of 23640061 in words is "twenty-three million, six hundred forty thousand, sixty-one".