826868617 has 2 divisors, whose sum is σ = 826868618. Its totient is φ = 826868616.

The previous prime is 826868597. The next prime is 826868639. The reversal of 826868617 is 716868628.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 432806416 + 394062201 = 20804^2 + 19851^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-826868617 is a prime.

It is a super-3 number, since 3×826868617³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (826868687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413434308 + 413434309.

It is an arithmetic number, because the mean of its divisors is an integer number (413434309).

Almost surely, 2^826868617 is an apocalyptic number.

It is an amenable number.

826868617 is a deficient number, since it is larger than the sum of its proper divisors (1).

826868617 is an equidigital number, since it uses as much as digits as its factorization.

826868617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 52.

The square root of 826868617 is about 28755.3232810901. The cubic root of 826868617 is about 938.5962966976.

The spelling of 826868617 in words is "eight hundred twenty-six million, eight hundred sixty-eight thousand, six hundred seventeen".