827199091 has 2 divisors, whose sum is σ = 827199092. Its totient is φ = 827199090.

The previous prime is 827199059. The next prime is 827199097. The reversal of 827199091 is 190991728.

It is a happy number.

827199091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 827199091 - 2⁵ = 827199059 is a prime.

It is not a weakly prime, because it can be changed into another prime (827199097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413599545 + 413599546.

It is an arithmetic number, because the mean of its divisors is an integer number (413599546).

Almost surely, 2^827199091 is an apocalyptic number.

827199091 is a deficient number, since it is larger than the sum of its proper divisors (1).

827199091 is an equidigital number, since it uses as much as digits as its factorization.

827199091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 46.

The square root of 827199091 is about 28761.0690169889. The cubic root of 827199091 is about 938.7213227505.

The spelling of 827199091 in words is "eight hundred twenty-seven million, one hundred ninety-nine thousand, ninety-one".