857099 has 2 divisors, whose sum is σ = 857100. Its totient is φ = 857098.

The previous prime is 857083. The next prime is 857107. The reversal of 857099 is 990758.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 857099 - 2⁴ = 857083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (857009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428549 + 428550.

It is an arithmetic number, because the mean of its divisors is an integer number (428550).

2⁸⁵⁷⁰⁹⁹ is an apocalyptic number.

857099 is a deficient number, since it is larger than the sum of its proper divisors (1).

857099 is an equidigital number, since it uses as much as digits as its factorization.

857099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 857099 is about 925.7964139053. The cubic root of 857099 is about 94.9898050001.

The spelling of 857099 in words is "eight hundred fifty-seven thousand, ninety-nine".