840293 has 4 divisors (see below), whose sum is σ = 889740. Its totient is φ = 790848.

The previous prime is 840289. The next prime is 840299. The reversal of 840293 is 392048.

840293 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 can be written as a sum of positive squares in 2 ways, for example, as 588289 + 252004 = 767^2 + 502^2 .

It is a cyclic number.

It is not a de Polignac number, because 840293 - 2² = 840289 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840293.

It is not an unprimeable number, because it can be changed into a prime (840299) 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, 24698 + ... + 24731.

It is an arithmetic number, because the mean of its divisors is an integer number (222435).

2⁸⁴⁰²⁹³ is an apocalyptic number.

It is an amenable number.

840293 is a deficient number, since it is larger than the sum of its proper divisors (49447).

840293 is a wasteful number, since it uses less digits than its factorization.

840293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49446.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 840293 is about 916.6749696594. The cubic root of 840293 is about 94.3648488416.

The spelling of 840293 in words is "eight hundred forty thousand, two hundred ninety-three".