989682917 has 4 divisors (see below), whose sum is σ = 991937760. Its totient is φ = 987428076.

The previous prime is 989682907. The next prime is 989682923. The reversal of 989682917 is 719286989.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 989682917 - 2⁶ = 989682853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989682907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1126763 + ... + 1127640.

It is an arithmetic number, because the mean of its divisors is an integer number (247984440).

Almost surely, 2^989682917 is an apocalyptic number.

It is an amenable number.

989682917 is a deficient number, since it is larger than the sum of its proper divisors (2254843).

989682917 is a wasteful number, since it uses less digits than its factorization.

989682917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2254842.

The product of its digits is 3919104, while the sum is 59.

The square root of 989682917 is about 31459.2262619410. The cubic root of 989682917 is about 996.5490771638.

The spelling of 989682917 in words is "nine hundred eighty-nine million, six hundred eighty-two thousand, nine hundred seventeen".