489646831 has 2 divisors, whose sum is σ = 489646832. Its totient is φ = 489646830.

The previous prime is 489646813. The next prime is 489646847. The reversal of 489646831 is 138646984.

Together with previous prime (489646813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 489646831 - 2²⁷ = 355429103 is a prime.

It is a super-2 number, since 2×489646831² = 479508038216685122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489646331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244823415 + 244823416.

It is an arithmetic number, because the mean of its divisors is an integer number (244823416).

Almost surely, 2^489646831 is an apocalyptic number.

489646831 is a deficient number, since it is larger than the sum of its proper divisors (1).

489646831 is an equidigital number, since it uses as much as digits as its factorization.

489646831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 49.

The square root of 489646831 is about 22127.9649086851. The cubic root of 489646831 is about 788.1840632452.

The spelling of 489646831 in words is "four hundred eighty-nine million, six hundred forty-six thousand, eight hundred thirty-one".