623409529 has 2 divisors, whose sum is σ = 623409530. Its totient is φ = 623409528.

The previous prime is 623409511. The next prime is 623409539. The reversal of 623409529 is 925904326.

623409529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 534673129 + 88736400 = 23123^2 + 9420^2 .

It is a cyclic number.

It is not a de Polignac number, because 623409529 - 2¹¹ = 623407481 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 623409491 and 623409500.

It is not a weakly prime, because it can be changed into another prime (623409539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311704764 + 311704765.

It is an arithmetic number, because the mean of its divisors is an integer number (311704765).

Almost surely, 2^623409529 is an apocalyptic number.

It is an amenable number.

623409529 is a deficient number, since it is larger than the sum of its proper divisors (1).

623409529 is an equidigital number, since it uses as much as digits as its factorization.

623409529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 623409529 is about 24968.1703174261. The cubic root of 623409529 is about 854.2621127032.

The spelling of 623409529 in words is "six hundred twenty-three million, four hundred nine thousand, five hundred twenty-nine".