989898785 has 8 divisors (see below), whose sum is σ = 1188640320. Its totient is φ = 791411184.

The previous prime is 989898781. The next prime is 989898809. The reversal of 989898785 is 587898989.

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 989898785 - 2² = 989898781 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (989898781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54797 + ... + 70586.

It is an arithmetic number, because the mean of its divisors is an integer number (148580040).

Almost surely, 2^989898785 is an apocalyptic number.

It is an amenable number.

989898785 is a deficient number, since it is larger than the sum of its proper divisors (198741535).

989898785 is a wasteful number, since it uses less digits than its factorization.

989898785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126967.

The product of its digits is 104509440, while the sum is 71.

The square root of 989898785 is about 31462.6569920597. The cubic root of 989898785 is about 996.6215271083.

The spelling of 989898785 in words is "nine hundred eighty-nine million, eight hundred ninety-eight thousand, seven hundred eighty-five".