23243621 has 2 divisors, whose sum is σ = 23243622. Its totient is φ = 23243620.

The previous prime is 23243603. The next prime is 23243629. The reversal of 23243621 is 12634232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15319396 + 7924225 = 3914^2 + 2815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23243621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23243629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11621810 + 11621811.

It is an arithmetic number, because the mean of its divisors is an integer number (11621811).

Almost surely, 2^23243621 is an apocalyptic number.

It is an amenable number.

23243621 is a deficient number, since it is larger than the sum of its proper divisors (1).

23243621 is an equidigital number, since it uses as much as digits as its factorization.

23243621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 23.

The square root of 23243621 is about 4821.1638636329. The cubic root of 23243621 is about 285.3872687453.

Adding to 23243621 its reverse (12634232), we get a palindrome (35877853).

The spelling of 23243621 in words is "twenty-three million, two hundred forty-three thousand, six hundred twenty-one".