840730343 has 4 divisors (see below), whose sum is σ = 843433968. Its totient is φ = 838026720.

The previous prime is 840730337. The next prime is 840730357. The reversal of 840730343 is 343037048.

840730343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 840730343 - 2⁴ = 840730327 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 (840730333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1351346 + ... + 1351967.

It is an arithmetic number, because the mean of its divisors is an integer number (210858492).

Almost surely, 2^840730343 is an apocalyptic number.

840730343 is a deficient number, since it is larger than the sum of its proper divisors (2703625).

840730343 is a wasteful number, since it uses less digits than its factorization.

840730343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703624.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 840730343 is about 28995.3503686367. The cubic root of 840730343 is about 943.8121719900.

The spelling of 840730343 in words is "eight hundred forty million, seven hundred thirty thousand, three hundred forty-three".