23748661 has 4 divisors (see below), whose sum is σ = 23759500. Its totient is φ = 23737824.

The previous prime is 23748653. The next prime is 23748667. The reversal of 23748661 is 16684732.

It is the 1990-th star 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 7700625 + 16048036 = 2775^2 + 4006^2 .

It is a cyclic number.

It is not a de Polignac number, because 23748661 - 2³ = 23748653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23748661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23748667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846 + ... + 6943.

It is an arithmetic number, because the mean of its divisors is an integer number (5939875).

Almost surely, 2^23748661 is an apocalyptic number.

It is an amenable number.

23748661 is a deficient number, since it is larger than the sum of its proper divisors (10839).

23748661 is an equidigital number, since it uses as much as digits as its factorization.

23748661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10838.

The product of its digits is 48384, while the sum is 37.

The square root of 23748661 is about 4873.2597919668. The cubic root of 23748661 is about 287.4394518996.

The spelling of 23748661 in words is "twenty-three million, seven hundred forty-eight thousand, six hundred sixty-one".