840784975 has 12 divisors (see below), whose sum is σ = 1051803216. Its totient is φ = 666673280.

The previous prime is 840784969. The next prime is 840785041. The reversal of 840784975 is 579487048.

It is not a de Polignac number, because 840784975 - 2¹⁷ = 840653903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145987 + ... + 151636.

It is an arithmetic number, because the mean of its divisors is an integer number (87650268).

Almost surely, 2^840784975 is an apocalyptic number.

840784975 is a deficient number, since it is larger than the sum of its proper divisors (211018241).

840784975 is a wasteful number, since it uses less digits than its factorization.

840784975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297746 (or 297741 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 52.

The square root of 840784975 is about 28996.2924354132. The cubic root of 840784975 is about 943.8326150212.

The spelling of 840784975 in words is "eight hundred forty million, seven hundred eighty-four thousand, nine hundred seventy-five".