816868583 has 2 divisors, whose sum is σ = 816868584. Its totient is φ = 816868582.

The previous prime is 816868567. The next prime is 816868651. The reversal of 816868583 is 385868618.

816868583 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 816868583 - 2⁴ = 816868567 is a prime.

It is a super-3 number, since 3×816868583³ (a number of 28 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816868553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408434291 + 408434292.

It is an arithmetic number, because the mean of its divisors is an integer number (408434292).

Almost surely, 2^816868583 is an apocalyptic number.

816868583 is a deficient number, since it is larger than the sum of its proper divisors (1).

816868583 is an equidigital number, since it uses as much as digits as its factorization.

816868583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2211840, while the sum is 53.

The square root of 816868583 is about 28580.9129140411. The cubic root of 816868583 is about 934.7971889892.

The spelling of 816868583 in words is "eight hundred sixteen million, eight hundred sixty-eight thousand, five hundred eighty-three".