840903 has 16 divisors (see below), whose sum is σ = 1337856. Its totient is φ = 459360.

The previous prime is 840863. The next prime is 840907. The reversal of 840903 is 309048.

It is not a de Polignac number, because 840903 - 2⁶ = 840839 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388 + ... + 1353.

It is an arithmetic number, because the mean of its divisors is an integer number (83616).

2⁸⁴⁰⁹⁰³ is an apocalyptic number.

840903 is a deficient number, since it is larger than the sum of its proper divisors (496953).

840903 is a wasteful number, since it uses less digits than its factorization.

840903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 840903 is about 917.0076335560. The cubic root of 840903 is about 94.3876776385.

The spelling of 840903 in words is "eight hundred forty thousand, nine hundred three".