23443621 has 2 divisors, whose sum is σ = 23443622. Its totient is φ = 23443620.

The previous prime is 23443613. The next prime is 23443633. The reversal of 23443621 is 12634432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13771521 + 9672100 = 3711^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 23443621 - 2³ = 23443613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23443661) 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, 11721810 + 11721811.

It is an arithmetic number, because the mean of its divisors is an integer number (11721811).

Almost surely, 2^23443621 is an apocalyptic number.

It is an amenable number.

23443621 is a deficient number, since it is larger than the sum of its proper divisors (1).

23443621 is an equidigital number, since it uses as much as digits as its factorization.

23443621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 25.

The square root of 23443621 is about 4841.8613156512. The cubic root of 23443621 is about 286.2034715219.

The spelling of 23443621 in words is "twenty-three million, four hundred forty-three thousand, six hundred twenty-one".