838860857 has 2 divisors, whose sum is σ = 838860858. Its totient is φ = 838860856.

The previous prime is 838860851. The next prime is 838860877. The reversal of 838860857 is 758068838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 836135056 + 2725801 = 28916^2 + 1651^2 .

It is a cyclic number.

It is not a de Polignac number, because 838860857 - 2⁸ = 838860601 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 838860799 and 838860808.

It is not a weakly prime, because it can be changed into another prime (838860851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419430428 + 419430429.

It is an arithmetic number, because the mean of its divisors is an integer number (419430429).

Almost surely, 2^838860857 is an apocalyptic number.

It is an amenable number.

838860857 is a deficient number, since it is larger than the sum of its proper divisors (1).

838860857 is an equidigital number, since it uses as much as digits as its factorization.

838860857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2580480, while the sum is 53.

The square root of 838860857 is about 28963.0947414119. The cubic root of 838860857 is about 943.1120850132.

The spelling of 838860857 in words is "eight hundred thirty-eight million, eight hundred sixty thousand, eight hundred fifty-seven".