826132591 has 2 divisors, whose sum is σ = 826132592. Its totient is φ = 826132590.

The previous prime is 826132543. The next prime is 826132667. The reversal of 826132591 is 195231628.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 826132591 - 2²¹ = 824035439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 826132591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (826132091) 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, 413066295 + 413066296.

It is an arithmetic number, because the mean of its divisors is an integer number (413066296).

Almost surely, 2^826132591 is an apocalyptic number.

826132591 is a deficient number, since it is larger than the sum of its proper divisors (1).

826132591 is an equidigital number, since it uses as much as digits as its factorization.

826132591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 37.

The square root of 826132591 is about 28742.5223492998. The cubic root of 826132591 is about 938.3177210596.

The spelling of 826132591 in words is "eight hundred twenty-six million, one hundred thirty-two thousand, five hundred ninety-one".