23140823 has 2 divisors, whose sum is σ = 23140824. Its totient is φ = 23140822.

The previous prime is 23140813. The next prime is 23140853. The reversal of 23140823 is 32804132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23140823 - 2¹⁰ = 23139799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23140813) 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, 11570411 + 11570412.

It is an arithmetic number, because the mean of its divisors is an integer number (11570412).

Almost surely, 2^23140823 is an apocalyptic number.

23140823 is a deficient number, since it is larger than the sum of its proper divisors (1).

23140823 is an equidigital number, since it uses as much as digits as its factorization.

23140823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 23140823 is about 4810.4909312876. The cubic root of 23140823 is about 284.9659259561.

Adding to 23140823 its reverse (32804132), we get a palindrome (55944955).

The spelling of 23140823 in words is "twenty-three million, one hundred forty thousand, eight hundred twenty-three".