840204047 has 8 divisors (see below), whose sum is σ = 862557696. Its totient is φ = 817978392.

The previous prime is 840203993. The next prime is 840204091. The reversal of 840204047 is 740402048.

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

It is a cyclic number.

It is not a de Polignac number, because 840204047 - 2¹² = 840199951 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 (840204347) 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, 18623 + ... + 45024.

It is an arithmetic number, because the mean of its divisors is an integer number (107819712).

Almost surely, 2^840204047 is an apocalyptic number.

840204047 is a deficient number, since it is larger than the sum of its proper divisors (22353649).

840204047 is a wasteful number, since it uses less digits than its factorization.

840204047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63997.

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 840204047 is about 28986.2734238122. The cubic root of 840204047 is about 943.6151891878.

The spelling of 840204047 in words is "eight hundred forty million, two hundred four thousand, forty-seven".