840543403 has 24 divisors (see below), whose sum is σ = 1004163072. Its totient is φ = 701147664.

The previous prime is 840543343. The next prime is 840543421. The reversal of 840543403 is 304345048.

840543403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 840543403 - 2⁹ = 840542891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840523403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 772726 + ... + 773812.

It is an arithmetic number, because the mean of its divisors is an integer number (41840128).

Almost surely, 2^840543403 is an apocalyptic number.

840543403 is a deficient number, since it is larger than the sum of its proper divisors (163619669).

840543403 is a wasteful number, since it uses less digits than its factorization.

840543403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511 (or 1504 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 840543403 is about 28992.1265691222. The cubic root of 840543403 is about 943.7422132422.

The spelling of 840543403 in words is "eight hundred forty million, five hundred forty-three thousand, four hundred three".