828707849 has 2 divisors, whose sum is σ = 828707850. Its totient is φ = 828707848.

The previous prime is 828707813. The next prime is 828707851. The reversal of 828707849 is 948707828.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 780196624 + 48511225 = 27932^2 + 6965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-828707849 is a prime.

It is a Sophie Germain prime.

Together with 828707851, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 828707849.

It is not a weakly prime, because it can be changed into another prime (828707809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414353924 + 414353925.

It is an arithmetic number, because the mean of its divisors is an integer number (414353925).

Almost surely, 2^828707849 is an apocalyptic number.

It is an amenable number.

828707849 is a deficient number, since it is larger than the sum of its proper divisors (1).

828707849 is an equidigital number, since it uses as much as digits as its factorization.

828707849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1806336, while the sum is 53.

The square root of 828707849 is about 28787.2862388937. The cubic root of 828707849 is about 939.2916985767.

The spelling of 828707849 in words is "eight hundred twenty-eight million, seven hundred seven thousand, eight hundred forty-nine".