865084987 has 8 divisors (see below), whose sum is σ = 938334320. Its totient is φ = 792793440.

The previous prime is 865084939. The next prime is 865084999. The reversal of 865084987 is 789480568.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865084987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865084387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237564 + ... + 241177.

It is an arithmetic number, because the mean of its divisors is an integer number (117291790).

Almost surely, 2^865084987 is an apocalyptic number.

865084987 is a deficient number, since it is larger than the sum of its proper divisors (73249333).

865084987 is a wasteful number, since it uses less digits than its factorization.

865084987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478893.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The square root of 865084987 is about 29412.3271265638. The cubic root of 865084987 is about 952.8391471682.

The spelling of 865084987 in words is "eight hundred sixty-five million, eighty-four thousand, nine hundred eighty-seven".