857929 has 2 divisors, whose sum is σ = 857930. Its totient is φ = 857928.

The previous prime is 857903. The next prime is 857951. The reversal of 857929 is 929758.

857929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 855625 + 2304 = 925^2 + 48^2 .

It is a cyclic number.

It is not a de Polignac number, because 857929 - 2⁵ = 857897 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 857891 and 857900.

It is not a weakly prime, because it can be changed into another prime (857959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428964 + 428965.

It is an arithmetic number, because the mean of its divisors is an integer number (428965).

2⁸⁵⁷⁹²⁹ is an apocalyptic number.

It is an amenable number.

857929 is a deficient number, since it is larger than the sum of its proper divisors (1).

857929 is an equidigital number, since it uses as much as digits as its factorization.

857929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 40.

The square root of 857929 is about 926.2445681352. The cubic root of 857929 is about 95.0204572749.

The spelling of 857929 in words is "eight hundred fifty-seven thousand, nine hundred twenty-nine".