828574991 has 2 divisors, whose sum is σ = 828574992. Its totient is φ = 828574990.

The previous prime is 828574987. The next prime is 828575063. The reversal of 828574991 is 199475828.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 828574991 - 2² = 828574987 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 (828574961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414287495 + 414287496.

It is an arithmetic number, because the mean of its divisors is an integer number (414287496).

Almost surely, 2^828574991 is an apocalyptic number.

828574991 is a deficient number, since it is larger than the sum of its proper divisors (1).

828574991 is an equidigital number, since it uses as much as digits as its factorization.

828574991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 53.

The square root of 828574991 is about 28784.9785652170. The cubic root of 828574991 is about 939.2415003127.

The spelling of 828574991 in words is "eight hundred twenty-eight million, five hundred seventy-four thousand, nine hundred ninety-one".