855923 has 2 divisors, whose sum is σ = 855924. Its totient is φ = 855922.

The previous prime is 855919. The next prime is 855937. The reversal of 855923 is 329558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855923 - 2² = 855919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 855923.

It is not a weakly prime, because it can be changed into another prime (855983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427961 + 427962.

It is an arithmetic number, because the mean of its divisors is an integer number (427962).

2⁸⁵⁵⁹²³ is an apocalyptic number.

855923 is a deficient number, since it is larger than the sum of its proper divisors (1).

855923 is an equidigital number, since it uses as much as digits as its factorization.

855923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 855923 is about 925.1610670581. The cubic root of 855923 is about 94.9463408884.

The spelling of 855923 in words is "eight hundred fifty-five thousand, nine hundred twenty-three".