826859491 has 2 divisors, whose sum is σ = 826859492. Its totient is φ = 826859490.

The previous prime is 826859483. The next prime is 826859543. The reversal of 826859491 is 194958628.

It is an a-pointer prime, because the next prime (826859543) can be obtained adding 826859491 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 826859491 - 2³ = 826859483 is a prime.

It is not a weakly prime, because it can be changed into another prime (826859401) 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, 413429745 + 413429746.

It is an arithmetic number, because the mean of its divisors is an integer number (413429746).

Almost surely, 2^826859491 is an apocalyptic number.

826859491 is a deficient number, since it is larger than the sum of its proper divisors (1).

826859491 is an equidigital number, since it uses as much as digits as its factorization.

826859491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 52.

The square root of 826859491 is about 28755.1645969902. The cubic root of 826859491 is about 938.5928436454.

The spelling of 826859491 in words is "eight hundred twenty-six million, eight hundred fifty-nine thousand, four hundred ninety-one".