828241991 has 2 divisors, whose sum is σ = 828241992. Its totient is φ = 828241990.

The previous prime is 828241951. The next prime is 828242017. The reversal of 828241991 is 199142828.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 828241991 - 2⁶ = 828241927 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (828241951) 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, 414120995 + 414120996.

It is an arithmetic number, because the mean of its divisors is an integer number (414120996).

Almost surely, 2^828241991 is an apocalyptic number.

828241991 is a deficient number, since it is larger than the sum of its proper divisors (1).

828241991 is an equidigital number, since it uses as much as digits as its factorization.

828241991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 44.

The square root of 828241991 is about 28779.1937169894. The cubic root of 828241991 is about 939.1156580203.

The spelling of 828241991 in words is "eight hundred twenty-eight million, two hundred forty-one thousand, nine hundred ninety-one".