842623 has 2 divisors, whose sum is σ = 842624. Its totient is φ = 842622.

The previous prime is 842617. The next prime is 842627. The reversal of 842623 is 326248.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 842623 - 2⁹ = 842111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421311 + 421312.

It is an arithmetic number, because the mean of its divisors is an integer number (421312).

2⁸⁴²⁶²³ is an apocalyptic number.

842623 is a deficient number, since it is larger than the sum of its proper divisors (1).

842623 is an equidigital number, since it uses as much as digits as its factorization.

842623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 842623 is about 917.9449874584. The cubic root of 842623 is about 94.4519879660.

The spelling of 842623 in words is "eight hundred forty-two thousand, six hundred twenty-three".