623668033 has 2 divisors, whose sum is σ = 623668034. Its totient is φ = 623668032.

The previous prime is 623668021. The next prime is 623668037. The reversal of 623668033 is 330866326.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 546016689 + 77651344 = 23367^2 + 8812^2 .

It is a cyclic number.

It is not a de Polignac number, because 623668033 - 2⁹ = 623667521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 623667983 and 623668001.

It is not a weakly prime, because it can be changed into another prime (623668037) 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, 311834016 + 311834017.

It is an arithmetic number, because the mean of its divisors is an integer number (311834017).

Almost surely, 2^623668033 is an apocalyptic number.

It is an amenable number.

623668033 is a deficient number, since it is larger than the sum of its proper divisors (1).

623668033 is an equidigital number, since it uses as much as digits as its factorization.

623668033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 623668033 is about 24973.3464517673. The cubic root of 623668033 is about 854.3801729545.

The spelling of 623668033 in words is "six hundred twenty-three million, six hundred sixty-eight thousand, thirty-three".