989689685 has 8 divisors (see below), whose sum is σ = 1193596800. Its totient is φ = 787772304.

The previous prime is 989689667. The next prime is 989689703. The reversal of 989689685 is 586986989.

It is an interprime number because it is at equal distance from previous prime (989689667) and next prime (989689703).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989689685 - 2⁶ = 989689621 is a prime.

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, 496337 + ... + 498326.

It is an arithmetic number, because the mean of its divisors is an integer number (149199600).

Almost surely, 2^989689685 is an apocalyptic number.

It is an amenable number.

989689685 is a deficient number, since it is larger than the sum of its proper divisors (203907115).

989689685 is a wasteful number, since it uses less digits than its factorization.

989689685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994867.

The product of its digits is 67184640, while the sum is 68.

The square root of 989689685 is about 31459.3338295648. Note that the first 3 decimals coincide. The cubic root of 989689685 is about 996.5513488101.

The spelling of 989689685 in words is "nine hundred eighty-nine million, six hundred eighty-nine thousand, six hundred eighty-five".