857852761 has 2 divisors, whose sum is σ = 857852762. Its totient is φ = 857852760.

The previous prime is 857852747. The next prime is 857852767. The reversal of 857852761 is 167258758.

857852761 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., 857318400 + 534361 = 29280^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 857852761 - 2⁵ = 857852729 is a prime.

It is a super-2 number, since 2×857852761² = 1471822719110646242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (857852767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428926380 + 428926381.

It is an arithmetic number, because the mean of its divisors is an integer number (428926381).

Almost surely, 2^857852761 is an apocalyptic number.

It is an amenable number.

857852761 is a deficient number, since it is larger than the sum of its proper divisors (1).

857852761 is an equidigital number, since it uses as much as digits as its factorization.

857852761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 940800, while the sum is 49.

The square root of 857852761 is about 29289.1235956285. The cubic root of 857852761 is about 950.1764255902.

The spelling of 857852761 in words is "eight hundred fifty-seven million, eight hundred fifty-two thousand, seven hundred sixty-one".