840082247 has 4 divisors (see below), whose sum is σ = 852620856. Its totient is φ = 827543640.

The previous prime is 840082241. The next prime is 840082261. The reversal of 840082247 is 742280048.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 840082247 - 2²⁸ = 571646791 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 (840082241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6269204 + ... + 6269337.

It is an arithmetic number, because the mean of its divisors is an integer number (213155214).

Almost surely, 2^840082247 is an apocalyptic number.

840082247 is a deficient number, since it is larger than the sum of its proper divisors (12538609).

840082247 is a wasteful number, since it uses less digits than its factorization.

840082247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12538608.

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 840082247 is about 28984.1723531999. The cubic root of 840082247 is about 943.5695899930.

The spelling of 840082247 in words is "eight hundred forty million, eighty-two thousand, two hundred forty-seven".