123215633 has 2 divisors, whose sum is σ = 123215634. Its totient is φ = 123215632.

The previous prime is 123215629. The next prime is 123215663. The reversal of 123215633 is 336512321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94614529 + 28601104 = 9727^2 + 5348^2 .

It is a cyclic number.

It is not a de Polignac number, because 123215633 - 2² = 123215629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (123215663) 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, 61607816 + 61607817.

It is an arithmetic number, because the mean of its divisors is an integer number (61607817).

Almost surely, 2^123215633 is an apocalyptic number.

It is an amenable number.

123215633 is a deficient number, since it is larger than the sum of its proper divisors (1).

123215633 is an equidigital number, since it uses as much as digits as its factorization.

123215633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 26.

The square root of 123215633 is about 11100.2537358387. The cubic root of 123215633 is about 497.6094325904.

Adding to 123215633 its reverse (336512321), we get a palindrome (459727954).

The spelling of 123215633 in words is "one hundred twenty-three million, two hundred fifteen thousand, six hundred thirty-three".