989087 has 4 divisors (see below), whose sum is σ = 1079016. Its totient is φ = 899160.

The previous prime is 989081. The next prime is 989099. The reversal of 989087 is 780989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780989 = 11 ⋅70999.

It is a cyclic number.

It is not a de Polignac number, because 989087 - 2⁴ = 989071 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989087.

It is not an unprimeable number, because it can be changed into a prime (989081) 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, 44948 + ... + 44969.

It is an arithmetic number, because the mean of its divisors is an integer number (269754).

2⁹⁸⁹⁰⁸⁷ is an apocalyptic number.

989087 is a deficient number, since it is larger than the sum of its proper divisors (89929).

989087 is a wasteful number, since it uses less digits than its factorization.

989087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89928.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 989087 is about 994.5285315163. The cubic root of 989087 is about 99.6349019900.

The spelling of 989087 in words is "nine hundred eighty-nine thousand, eighty-seven".