523386889 has 2 divisors, whose sum is σ = 523386890. Its totient is φ = 523386888.

The previous prime is 523386887. The next prime is 523386917. The reversal of 523386889 is 988683325.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407716864 + 115670025 = 20192^2 + 10755^2 .

It is a cyclic number.

It is not a de Polignac number, because 523386889 - 2¹ = 523386887 is a prime.

Together with 523386887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (523386887) 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, 261693444 + 261693445.

It is an arithmetic number, because the mean of its divisors is an integer number (261693445).

Almost surely, 2^523386889 is an apocalyptic number.

It is an amenable number.

523386889 is a deficient number, since it is larger than the sum of its proper divisors (1).

523386889 is an equidigital number, since it uses as much as digits as its factorization.

523386889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 52.

The square root of 523386889 is about 22877.6504256884. The cubic root of 523386889 is about 805.8872405764.

The spelling of 523386889 in words is "five hundred twenty-three million, three hundred eighty-six thousand, eight hundred eighty-nine".