523402889 has 2 divisors, whose sum is σ = 523402890. Its totient is φ = 523402888.

The previous prime is 523402877. The next prime is 523402903. The reversal of 523402889 is 988204325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 513792889 + 9610000 = 22667^2 + 3100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523402889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (523402829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261701444 + 261701445.

It is an arithmetic number, because the mean of its divisors is an integer number (261701445).

Almost surely, 2^523402889 is an apocalyptic number.

It is an amenable number.

523402889 is a deficient number, since it is larger than the sum of its proper divisors (1).

523402889 is an equidigital number, since it uses as much as digits as its factorization.

523402889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 523402889 is about 22878.0001092753. Note that the first 3 decimals coincide. The cubic root of 523402889 is about 805.8954525160.

The spelling of 523402889 in words is "five hundred twenty-three million, four hundred two thousand, eight hundred eighty-nine".