989913566 has 16 divisors (see below), whose sum is σ = 1565591760. Its totient is φ = 468135360.

The previous prime is 989913559. The next prime is 989913571. The reversal of 989913566 is 665319989.

989913566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2336 + ... + 44556.

It is an arithmetic number, because the mean of its divisors is an integer number (97849485).

Almost surely, 2^989913566 is an apocalyptic number.

989913566 is a deficient number, since it is larger than the sum of its proper divisors (575678194).

989913566 is a wasteful number, since it uses less digits than its factorization.

989913566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42859.

The product of its digits is 3149280, while the sum is 56.

The square root of 989913566 is about 31462.8918886996. The cubic root of 989913566 is about 996.6264875446.

The spelling of 989913566 in words is "nine hundred eighty-nine million, nine hundred thirteen thousand, five hundred sixty-six".