489236879 has 2 divisors, whose sum is σ = 489236880. Its totient is φ = 489236878.

The previous prime is 489236851. The next prime is 489236921. The reversal of 489236879 is 978632984.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489236879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489236779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244618439 + 244618440.

It is an arithmetic number, because the mean of its divisors is an integer number (244618440).

Almost surely, 2^489236879 is an apocalyptic number.

489236879 is a deficient number, since it is larger than the sum of its proper divisors (1).

489236879 is an equidigital number, since it uses as much as digits as its factorization.

489236879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 56.

The square root of 489236879 is about 22118.6997583493. The cubic root of 489236879 is about 787.9640353732.

The spelling of 489236879 in words is "four hundred eighty-nine million, two hundred thirty-six thousand, eight hundred seventy-nine".