828304781 has 2 divisors, whose sum is σ = 828304782. Its totient is φ = 828304780.

The previous prime is 828304739. The next prime is 828304907. The reversal of 828304781 is 187403828.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667395556 + 160909225 = 25834^2 + 12685^2 .

It is a cyclic number.

It is not a de Polignac number, because 828304781 - 2¹⁰ = 828303757 is a prime.

It is a super-2 number, since 2×828304781² = 1372177620454915922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (828304721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414152390 + 414152391.

It is an arithmetic number, because the mean of its divisors is an integer number (414152391).

Almost surely, 2^828304781 is an apocalyptic number.

It is an amenable number.

828304781 is a deficient number, since it is larger than the sum of its proper divisors (1).

828304781 is an equidigital number, since it uses as much as digits as its factorization.

828304781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 828304781 is about 28780.2845885860. The cubic root of 828304781 is about 939.1393892417.

The spelling of 828304781 in words is "eight hundred twenty-eight million, three hundred four thousand, seven hundred eighty-one".