811446047 has 4 divisors (see below), whose sum is σ = 831237456. Its totient is φ = 791654640.

The previous prime is 811446043. The next prime is 811446073. The reversal of 811446047 is 740644118.

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 811446047 - 2² = 811446043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 811445998 and 811446016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811446043) 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, 9895643 + ... + 9895724.

It is an arithmetic number, because the mean of its divisors is an integer number (207809364).

Almost surely, 2^811446047 is an apocalyptic number.

811446047 is a deficient number, since it is larger than the sum of its proper divisors (19791409).

811446047 is a wasteful number, since it uses less digits than its factorization.

811446047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19791408.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 811446047 is about 28485.8920695842. The cubic root of 811446047 is about 932.7241385851.

The spelling of 811446047 in words is "eight hundred eleven million, four hundred forty-six thousand, forty-seven".