489678876989 has 2 divisors, whose sum is σ = 489678876990. Its totient is φ = 489678876988.

The previous prime is 489678876959. The next prime is 489678877007. The reversal of 489678876989 is 989678876984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467468936089 + 22209940900 = 683717^2 + 149030^2 .

It is a cyclic number.

It is not a de Polignac number, because 489678876989 - 2⁸ = 489678876733 is a prime.

It is a super-2 number, since 2×489678876989² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489678876959) 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, 244839438494 + 244839438495.

It is an arithmetic number, because the mean of its divisors is an integer number (244839438495).

Almost surely, 2^489678876989 is an apocalyptic number.

It is an amenable number.

489678876989 is a deficient number, since it is larger than the sum of its proper divisors (1).

489678876989 is an equidigital number, since it uses as much as digits as its factorization.

489678876989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21069103104, while the sum is 89.

The spelling of 489678876989 in words is "four hundred eighty-nine billion, six hundred seventy-eight million, eight hundred seventy-six thousand, nine hundred eighty-nine".