842393 has 2 divisors, whose sum is σ = 842394. Its totient is φ = 842392.

The previous prime is 842383. The next prime is 842399. The reversal of 842393 is 393248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 797449 + 44944 = 893^2 + 212^2 .

It is a cyclic number.

It is not a de Polignac number, because 842393 - 2¹⁰ = 841369 is a prime.

It is not a weakly prime, because it can be changed into another prime (842399) 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 as a sum of consecutive naturals, namely, 421196 + 421197.

It is an arithmetic number, because the mean of its divisors is an integer number (421197).

2⁸⁴²³⁹³ is an apocalyptic number.

It is an amenable number.

842393 is a deficient number, since it is larger than the sum of its proper divisors (1).

842393 is an equidigital number, since it uses as much as digits as its factorization.

842393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

The square root of 842393 is about 917.8196990695. The cubic root of 842393 is about 94.4433934011.

The spelling of 842393 in words is "eight hundred forty-two thousand, three hundred ninety-three".