989080687 has 4 divisors (see below), whose sum is σ = 1130377936. Its totient is φ = 847783440.

The previous prime is 989080681. The next prime is 989080693. The reversal of 989080687 is 786080989.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (989080681) and next prime (989080693).

It is a de Polignac number, because none of the positive numbers 2^k-989080687 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 (989080681) 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, 70648614 + ... + 70648627.

It is an arithmetic number, because the mean of its divisors is an integer number (282594484).

Almost surely, 2^989080687 is an apocalyptic number.

989080687 is a deficient number, since it is larger than the sum of its proper divisors (141297249).

989080687 is a wasteful number, since it uses less digits than its factorization.

989080687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141297248.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The square root of 989080687 is about 31449.6532095348. The cubic root of 989080687 is about 996.3469001116.

The spelling of 989080687 in words is "nine hundred eighty-nine million, eighty thousand, six hundred eighty-seven".