857723 has 2 divisors, whose sum is σ = 857724. Its totient is φ = 857722.

The previous prime is 857713. The next prime is 857737. The reversal of 857723 is 327758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 857723 - 2⁴ = 857707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 857723.

It is not a weakly prime, because it can be changed into another prime (857713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428861 + 428862.

It is an arithmetic number, because the mean of its divisors is an integer number (428862).

2⁸⁵⁷⁷²³ is an apocalyptic number.

857723 is a deficient number, since it is larger than the sum of its proper divisors (1).

857723 is an equidigital number, since it uses as much as digits as its factorization.

857723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 32.

The square root of 857723 is about 926.1333597274. The cubic root of 857723 is about 95.0128514470.

The spelling of 857723 in words is "eight hundred fifty-seven thousand, seven hundred twenty-three".