989000000687 has 4 divisors (see below), whose sum is σ = 992649447456. Its totient is φ = 985350553920.

The previous prime is 989000000683. The next prime is 989000000771. The reversal of 989000000687 is 786000000989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786000000989 = 7 ⋅112285714427.

It is a cyclic number.

It is not a de Polignac number, because 989000000687 - 2² = 989000000683 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 (989000000683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1824722978 + ... + 1824723519.

It is an arithmetic number, because the mean of its divisors is an integer number (248162361864).

Almost surely, 2^989000000687 is an apocalyptic number.

989000000687 is a deficient number, since it is larger than the sum of its proper divisors (3649446769).

989000000687 is a wasteful number, since it uses less digits than its factorization.

989000000687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649446768.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 989000000687 in words is "nine hundred eighty-nine billion, six hundred eighty-seven", and thus it is an aban number.