838585861 has 2 divisors, whose sum is σ = 838585862. Its totient is φ = 838585860.

The previous prime is 838585859. The next prime is 838585901. The reversal of 838585861 is 168585838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 836944900 + 1640961 = 28930^2 + 1281^2 .

It is a cyclic number.

It is not a de Polignac number, because 838585861 - 2¹ = 838585859 is a prime.

It is a super-2 number, since 2×838585861² = 1406452492538222642, which contains 22 as substring.

Together with 838585859, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 838585799 and 838585808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (838585831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419292930 + 419292931.

It is an arithmetic number, because the mean of its divisors is an integer number (419292931).

Almost surely, 2^838585861 is an apocalyptic number.

It is an amenable number.

838585861 is a deficient number, since it is larger than the sum of its proper divisors (1).

838585861 is an equidigital number, since it uses as much as digits as its factorization.

838585861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1843200, while the sum is 52.

The square root of 838585861 is about 28958.3470004764. The cubic root of 838585861 is about 943.0090165109.

The spelling of 838585861 in words is "eight hundred thirty-eight million, five hundred eighty-five thousand, eight hundred sixty-one".