989898766 has 4 divisors (see below), whose sum is σ = 1484848152. Its totient is φ = 494949382.

The previous prime is 989898739. The next prime is 989898781. The reversal of 989898766 is 667898989.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 667898989 = 419 ⋅1594031.

It is a junction number, because it is equal to n+sod(n) for n = 989898695 and 989898704.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247474690 + ... + 247474693.

It is an arithmetic number, because the mean of its divisors is an integer number (371212038).

Almost surely, 2^989898766 is an apocalyptic number.

989898766 is a deficient number, since it is larger than the sum of its proper divisors (494949386).

989898766 is a wasteful number, since it uses less digits than its factorization.

989898766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494949385.

The product of its digits is 94058496, while the sum is 70.

The square root of 989898766 is about 31462.6566901144. The cubic root of 989898766 is about 996.6215207320.

The spelling of 989898766 in words is "nine hundred eighty-nine million, eight hundred ninety-eight thousand, seven hundred sixty-six".