828518641 has 2 divisors, whose sum is σ = 828518642. Its totient is φ = 828518640.

The previous prime is 828518633. The next prime is 828518707. The reversal of 828518641 is 146815828.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 575040400 + 253478241 = 23980^2 + 15921^2 .

It is a cyclic number.

It is not a de Polignac number, because 828518641 - 2³ = 828518633 is a prime.

It is a super-4 number, since 4×828518641⁴ (a number of 37 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (828519641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414259320 + 414259321.

It is an arithmetic number, because the mean of its divisors is an integer number (414259321).

Almost surely, 2^828518641 is an apocalyptic number.

It is an amenable number.

828518641 is a deficient number, since it is larger than the sum of its proper divisors (1).

828518641 is an equidigital number, since it uses as much as digits as its factorization.

828518641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122880, while the sum is 43.

The square root of 828518641 is about 28783.9997394386. Note that the first 3 decimals coincide. The cubic root of 828518641 is about 939.2202077486.

The spelling of 828518641 in words is "eight hundred twenty-eight million, five hundred eighteen thousand, six hundred forty-one".