23434561 has 2 divisors, whose sum is σ = 23434562. Its totient is φ = 23434560.

The previous prime is 23434559. The next prime is 23434573. The reversal of 23434561 is 16543432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18326961 + 5107600 = 4281^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 23434561 - 2¹ = 23434559 is a prime.

Together with 23434559, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (23434511) 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 as a sum of consecutive naturals, namely, 11717280 + 11717281.

It is an arithmetic number, because the mean of its divisors is an integer number (11717281).

Almost surely, 2^23434561 is an apocalyptic number.

It is an amenable number.

23434561 is a deficient number, since it is larger than the sum of its proper divisors (1).

23434561 is an equidigital number, since it uses as much as digits as its factorization.

23434561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 28.

The square root of 23434561 is about 4840.9256346282. The cubic root of 23434561 is about 286.1665981288.

Adding to 23434561 its reverse (16543432), we get a palindrome (39977993).

The spelling of 23434561 in words is "twenty-three million, four hundred thirty-four thousand, five hundred sixty-one".