840543329 has 4 divisors (see below), whose sum is σ = 840835776. Its totient is φ = 840250884.

The previous prime is 840543293. The next prime is 840543343. The reversal of 840543329 is 923345048.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 840543329 - 2¹⁶ = 840477793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 840543292 and 840543301.

It is not an unprimeable number, because it can be changed into a prime (840543929) 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, 141869 + ... + 147674.

It is an arithmetic number, because the mean of its divisors is an integer number (210208944).

Almost surely, 2^840543329 is an apocalyptic number.

It is an amenable number.

840543329 is a deficient number, since it is larger than the sum of its proper divisors (292447).

840543329 is a wasteful number, since it uses less digits than its factorization.

840543329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292446.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 840543329 is about 28992.1252929136. The cubic root of 840543329 is about 943.7421855470.

The spelling of 840543329 in words is "eight hundred forty million, five hundred forty-three thousand, three hundred twenty-nine".