840896987 has 24 divisors (see below), whose sum is σ = 995904000. Its totient is φ = 707824656.

The previous prime is 840896981. The next prime is 840897007. The reversal of 840896987 is 789698048.

It is not a de Polignac number, because 840896987 - 2¹⁰ = 840895963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840896981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 808814 + ... + 809852.

It is an arithmetic number, because the mean of its divisors is an integer number (41496000).

Almost surely, 2^840896987 is an apocalyptic number.

840896987 is a deficient number, since it is larger than the sum of its proper divisors (155007013).

840896987 is a wasteful number, since it uses less digits than its factorization.

840896987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 59.

The square root of 840896987 is about 28998.2238594021. The cubic root of 840896987 is about 943.8745266028.

The spelling of 840896987 in words is "eight hundred forty million, eight hundred ninety-six thousand, nine hundred eighty-seven".