828726643 has 2 divisors, whose sum is σ = 828726644. Its totient is φ = 828726642.

The previous prime is 828726641. The next prime is 828726671. The reversal of 828726643 is 346627828.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 828726643 - 2¹ = 828726641 is a prime.

It is a super-3 number, since 3×828726643³ (a number of 28 digits) contains 333 as substring.

Together with 828726641, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 828726593 and 828726602.

It is not a weakly prime, because it can be changed into another prime (828726641) 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, 414363321 + 414363322.

It is an arithmetic number, because the mean of its divisors is an integer number (414363322).

Almost surely, 2^828726643 is an apocalyptic number.

828726643 is a deficient number, since it is larger than the sum of its proper divisors (1).

828726643 is an equidigital number, since it uses as much as digits as its factorization.

828726643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 46.

The square root of 828726643 is about 28787.6126658672. The cubic root of 828726643 is about 939.2987991549.

The spelling of 828726643 in words is "eight hundred twenty-eight million, seven hundred twenty-six thousand, six hundred forty-three".