23123813 has 2 divisors, whose sum is σ = 23123814. Its totient is φ = 23123812.

The previous prime is 23123803. The next prime is 23123827. The reversal of 23123813 is 31832132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21362884 + 1760929 = 4622^2 + 1327^2 .

It is a cyclic number.

It is not a de Polignac number, because 23123813 - 2¹⁸ = 22861669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23123803) 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, 11561906 + 11561907.

It is an arithmetic number, because the mean of its divisors is an integer number (11561907).

Almost surely, 2^23123813 is an apocalyptic number.

It is an amenable number.

23123813 is a deficient number, since it is larger than the sum of its proper divisors (1).

23123813 is an equidigital number, since it uses as much as digits as its factorization.

23123813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

The square root of 23123813 is about 4808.7225954509. The cubic root of 23123813 is about 284.8960860521.

Adding to 23123813 its reverse (31832132), we get a palindrome (54955945).

The spelling of 23123813 in words is "twenty-three million, one hundred twenty-three thousand, eight hundred thirteen".