489517823 has 2 divisors, whose sum is σ = 489517824. Its totient is φ = 489517822.

The previous prime is 489517799. The next prime is 489517841. The reversal of 489517823 is 328715984.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 489517823 - 2⁶ = 489517759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489517723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244758911 + 244758912.

It is an arithmetic number, because the mean of its divisors is an integer number (244758912).

Almost surely, 2^489517823 is an apocalyptic number.

489517823 is a deficient number, since it is larger than the sum of its proper divisors (1).

489517823 is an equidigital number, since it uses as much as digits as its factorization.

489517823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The square root of 489517823 is about 22125.0496722606. The cubic root of 489517823 is about 788.1148358112.

The spelling of 489517823 in words is "four hundred eighty-nine million, five hundred seventeen thousand, eight hundred twenty-three".