623219689 has 2 divisors, whose sum is σ = 623219690. Its totient is φ = 623219688.

The previous prime is 623219687. The next prime is 623219717. The reversal of 623219689 is 986912326.

623219689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 623001600 + 218089 = 24960^2 + 467^2 .

It is a cyclic number.

It is not a de Polignac number, because 623219689 - 2¹ = 623219687 is a prime.

Together with 623219687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (623219687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311609844 + 311609845.

It is an arithmetic number, because the mean of its divisors is an integer number (311609845).

Almost surely, 2^623219689 is an apocalyptic number.

It is an amenable number.

623219689 is a deficient number, since it is larger than the sum of its proper divisors (1).

623219689 is an equidigital number, since it uses as much as digits as its factorization.

623219689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 46.

The square root of 623219689 is about 24964.3683877642. The cubic root of 623219689 is about 854.1753909062.

It can be divided in two parts, 62321 and 9689, that added together give a triangular number (72010 = T₃₇₉).

The spelling of 623219689 in words is "six hundred twenty-three million, two hundred nineteen thousand, six hundred eighty-nine".