489655931 has 2 divisors, whose sum is σ = 489655932. Its totient is φ = 489655930.

The previous prime is 489655919. The next prime is 489655951. The reversal of 489655931 is 139556984.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 489655931 - 2¹⁸ = 489393787 is a prime.

It is a super-2 number, since 2×489655931² = 479525861526953522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 489655931.

It is not a weakly prime, because it can be changed into another prime (489655951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244827965 + 244827966.

It is an arithmetic number, because the mean of its divisors is an integer number (244827966).

Almost surely, 2^489655931 is an apocalyptic number.

489655931 is a deficient number, since it is larger than the sum of its proper divisors (1).

489655931 is an equidigital number, since it uses as much as digits as its factorization.

489655931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 50.

The square root of 489655931 is about 22128.1705298924. The cubic root of 489655931 is about 788.1889459689.

The spelling of 489655931 in words is "four hundred eighty-nine million, six hundred fifty-five thousand, nine hundred thirty-one".