857700841 has 2 divisors, whose sum is σ = 857700842. Its totient is φ = 857700840.

The previous prime is 857700827. The next prime is 857700887. The reversal of 857700841 is 148007758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 505350400 + 352350441 = 22480^2 + 18771^2 .

It is a cyclic number.

It is not a de Polignac number, because 857700841 - 2⁹ = 857700329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 857700794 and 857700803.

It is not a weakly prime, because it can be changed into another prime (857700821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428850420 + 428850421.

It is an arithmetic number, because the mean of its divisors is an integer number (428850421).

Almost surely, 2^857700841 is an apocalyptic number.

It is an amenable number.

857700841 is a deficient number, since it is larger than the sum of its proper divisors (1).

857700841 is an equidigital number, since it uses as much as digits as its factorization.

857700841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 857700841 is about 29286.5300266180. The cubic root of 857700841 is about 950.1203323105.

The spelling of 857700841 in words is "eight hundred fifty-seven million, seven hundred thousand, eight hundred forty-one".