800823911 has 2 divisors, whose sum is σ = 800823912. Its totient is φ = 800823910.

The previous prime is 800823889. The next prime is 800824019. The reversal of 800823911 is 119328008.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800823911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800873911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400411955 + 400411956.

It is an arithmetic number, because the mean of its divisors is an integer number (400411956).

Almost surely, 2^800823911 is an apocalyptic number.

800823911 is a deficient number, since it is larger than the sum of its proper divisors (1).

800823911 is an equidigital number, since it uses as much as digits as its factorization.

800823911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 800823911 is about 28298.8323257339. The cubic root of 800823911 is about 928.6363453888.

The spelling of 800823911 in words is "eight hundred million, eight hundred twenty-three thousand, nine hundred eleven".