811708243 has 4 divisors (see below), whose sum is σ = 822827608. Its totient is φ = 800588880.

The previous prime is 811708237. The next prime is 811708277. The reversal of 811708243 is 342807118.

It is a happy number.

811708243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 811708243 - 2⁹ = 811707731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 811708199 and 811708208.

It is not an unprimeable number, because it can be changed into a prime (811708223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5559573 + ... + 5559718.

It is an arithmetic number, because the mean of its divisors is an integer number (205706902).

Almost surely, 2^811708243 is an apocalyptic number.

811708243 is a deficient number, since it is larger than the sum of its proper divisors (11119365).

811708243 is a wasteful number, since it uses less digits than its factorization.

811708243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11119364.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 811708243 is about 28490.4939058627. The cubic root of 811708243 is about 932.8245889697.

The spelling of 811708243 in words is "eight hundred eleven million, seven hundred eight thousand, two hundred forty-three".