623266901 has 2 divisors, whose sum is σ = 623266902. Its totient is φ = 623266900.

The previous prime is 623266883. The next prime is 623266913. The reversal of 623266901 is 109662326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 493284100 + 129982801 = 22210^2 + 11401^2 .

It is a cyclic number.

It is not a de Polignac number, because 623266901 - 2²⁶ = 556158037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623266001) 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, 311633450 + 311633451.

It is an arithmetic number, because the mean of its divisors is an integer number (311633451).

Almost surely, 2^623266901 is an apocalyptic number.

It is an amenable number.

623266901 is a deficient number, since it is larger than the sum of its proper divisors (1).

623266901 is an equidigital number, since it uses as much as digits as its factorization.

623266901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 623266901 is about 24965.3139575692. The cubic root of 623266901 is about 854.1969597104.

The spelling of 623266901 in words is "six hundred twenty-three million, two hundred sixty-six thousand, nine hundred one".