623123329 has 2 divisors, whose sum is σ = 623123330. Its totient is φ = 623123328.

The previous prime is 623123311. The next prime is 623123407. The reversal of 623123329 is 923321326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322274304 + 300849025 = 17952^2 + 17345^2 .

It is a cyclic number.

It is not a de Polignac number, because 623123329 - 2²⁵ = 589568897 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 623123329.

It is not a weakly prime, because it can be changed into another prime (623123309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311561664 + 311561665.

It is an arithmetic number, because the mean of its divisors is an integer number (311561665).

Almost surely, 2^623123329 is an apocalyptic number.

It is an amenable number.

623123329 is a deficient number, since it is larger than the sum of its proper divisors (1).

623123329 is an equidigital number, since it uses as much as digits as its factorization.

623123329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 31.

The square root of 623123329 is about 24962.4383624677. The cubic root of 623123329 is about 854.1313654555.

The spelling of 623123329 in words is "six hundred twenty-three million, one hundred twenty-three thousand, three hundred twenty-nine".