987869087 has 4 divisors (see below), whose sum is σ = 988237800. Its totient is φ = 987500376.

The previous prime is 987869083. The next prime is 987869101. The reversal of 987869087 is 780968789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780968789 = 383 ⋅2039083.

It is a cyclic number.

It is not a de Polignac number, because 987869087 - 2² = 987869083 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 (987869081) 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, 180308 + ... + 185705.

It is an arithmetic number, because the mean of its divisors is an integer number (247059450).

Almost surely, 2^987869087 is an apocalyptic number.

987869087 is a deficient number, since it is larger than the sum of its proper divisors (368713).

987869087 is a wasteful number, since it uses less digits than its factorization.

987869087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368712.

The product of its (nonzero) digits is 12192768, while the sum is 62.

The square root of 987869087 is about 31430.3847733368. The cubic root of 987869087 is about 995.9399002327.

The spelling of 987869087 in words is "nine hundred eighty-seven million, eight hundred sixty-nine thousand, eighty-seven".