857766053 has 4 divisors (see below), whose sum is σ = 866609100. Its totient is φ = 848923008.

The previous prime is 857766047. The next prime is 857766083. The reversal of 857766053 is 350667758.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 255456289 + 602309764 = 15983^2 + 24542^2 .

It is a cyclic number.

It is not a de Polignac number, because 857766053 - 2⁴ = 857766037 is a prime.

It is a super-3 number, since 3×857766053³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 857765989 and 857766007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857766083) 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 in 3 ways as a sum of consecutive naturals, for example, 4421378 + ... + 4421571.

It is an arithmetic number, because the mean of its divisors is an integer number (216652275).

Almost surely, 2^857766053 is an apocalyptic number.

It is an amenable number.

857766053 is a deficient number, since it is larger than the sum of its proper divisors (8843047).

857766053 is an equidigital number, since it uses as much as digits as its factorization.

857766053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8843046.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The square root of 857766053 is about 29287.6433500546. The cubic root of 857766053 is about 950.1444112877.

The spelling of 857766053 in words is "eight hundred fifty-seven million, seven hundred sixty-six thousand, fifty-three".