823872859 has 2 divisors, whose sum is σ = 823872860. Its totient is φ = 823872858.

The previous prime is 823872839. The next prime is 823872869. The reversal of 823872859 is 958278328.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 823872859 - 2⁹ = 823872347 is a prime.

It is not a weakly prime, because it can be changed into another prime (823872839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411936429 + 411936430.

It is an arithmetic number, because the mean of its divisors is an integer number (411936430).

Almost surely, 2^823872859 is an apocalyptic number.

823872859 is a deficient number, since it is larger than the sum of its proper divisors (1).

823872859 is an equidigital number, since it uses as much as digits as its factorization.

823872859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 52.

The square root of 823872859 is about 28703.1855200777. The cubic root of 823872859 is about 937.4614086396.

The spelling of 823872859 in words is "eight hundred twenty-three million, eight hundred seventy-two thousand, eight hundred fifty-nine".