840923 has 2 divisors, whose sum is σ = 840924. Its totient is φ = 840922.

The previous prime is 840911. The next prime is 840929. The reversal of 840923 is 329048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 840923 - 2⁴ = 840907 is a prime.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 840892 and 840901.

It is not a weakly prime, because it can be changed into another prime (840929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420461 + 420462.

It is an arithmetic number, because the mean of its divisors is an integer number (420462).

2⁸⁴⁰⁹²³ is an apocalyptic number.

840923 is a deficient number, since it is larger than the sum of its proper divisors (1).

840923 is an equidigital number, since it uses as much as digits as its factorization.

840923 is an evil number, because the sum of its binary digits is even.

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

The square root of 840923 is about 917.0185385258. The cubic root of 840923 is about 94.3884259366.

The spelling of 840923 in words is "eight hundred forty thousand, nine hundred twenty-three".