857775157 has 2 divisors, whose sum is σ = 857775158. Its totient is φ = 857775156.

The previous prime is 857775119. The next prime is 857775169. The reversal of 857775157 is 751577758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 824493796 + 33281361 = 28714^2 + 5769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857775157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857775187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428887578 + 428887579.

It is an arithmetic number, because the mean of its divisors is an integer number (428887579).

Almost surely, 2^857775157 is an apocalyptic number.

It is an amenable number.

857775157 is a deficient number, since it is larger than the sum of its proper divisors (1).

857775157 is an equidigital number, since it uses as much as digits as its factorization.

857775157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2401000, while the sum is 52.

The square root of 857775157 is about 29287.7987735507. The cubic root of 857775157 is about 950.1477727653.

The spelling of 857775157 in words is "eight hundred fifty-seven million, seven hundred seventy-five thousand, one hundred fifty-seven".