23144921 has 2 divisors, whose sum is σ = 23144922. Its totient is φ = 23144920.

The previous prime is 23144911. The next prime is 23144963. The reversal of 23144921 is 12944132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15366400 + 7778521 = 3920^2 + 2789^2 .

It is a cyclic number.

It is not a de Polignac number, because 23144921 - 2¹⁴ = 23128537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23144911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11572460 + 11572461.

It is an arithmetic number, because the mean of its divisors is an integer number (11572461).

Almost surely, 2^23144921 is an apocalyptic number.

It is an amenable number.

23144921 is a deficient number, since it is larger than the sum of its proper divisors (1).

23144921 is an equidigital number, since it uses as much as digits as its factorization.

23144921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 23144921 is about 4810.9168564838. The cubic root of 23144921 is about 284.9827464676.

The spelling of 23144921 in words is "twenty-three million, one hundred forty-four thousand, nine hundred twenty-one".