867819853 has 2 divisors, whose sum is σ = 867819854. Its totient is φ = 867819852.

The previous prime is 867819847. The next prime is 867819871. The reversal of 867819853 is 358918768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 811224324 + 56595529 = 28482^2 + 7523^2 .

It is a cyclic number.

It is not a de Polignac number, because 867819853 - 2²¹ = 865722701 is a prime.

It is a super-2 number, since 2×867819853² = 1506222594521883218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 867819794 and 867819803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (867819833) 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, 433909926 + 433909927.

It is an arithmetic number, because the mean of its divisors is an integer number (433909927).

Almost surely, 2^867819853 is an apocalyptic number.

It is an amenable number.

867819853 is a deficient number, since it is larger than the sum of its proper divisors (1).

867819853 is an equidigital number, since it uses as much as digits as its factorization.

867819853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 55.

The square root of 867819853 is about 29458.7822728639. The cubic root of 867819853 is about 953.8421877822.

The spelling of 867819853 in words is "eight hundred sixty-seven million, eight hundred nineteen thousand, eight hundred fifty-three".