811081347 has 4 divisors (see below), whose sum is σ = 1081441800. Its totient is φ = 540720896.

The previous prime is 811081333. The next prime is 811081363. The reversal of 811081347 is 743180118.

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 811081347 - 2¹² = 811077251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (811081307) 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, 135180222 + ... + 135180227.

It is an arithmetic number, because the mean of its divisors is an integer number (270360450).

Almost surely, 2^811081347 is an apocalyptic number.

811081347 is a deficient number, since it is larger than the sum of its proper divisors (270360453).

811081347 is a wasteful number, since it uses less digits than its factorization.

811081347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270360452.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 811081347 is about 28479.4899357415. The cubic root of 811081347 is about 932.5843817198.

The spelling of 811081347 in words is "eight hundred eleven million, eighty-one thousand, three hundred forty-seven".