811314905 has 4 divisors (see below), whose sum is σ = 973577892. Its totient is φ = 649051920.

The previous prime is 811314869. The next prime is 811314923. The reversal of 811314905 is 509413118.

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

It can be written as a sum of positive squares in 2 ways, for example, as 547934464 + 263380441 = 23408^2 + 16229^2 .

It is a de Polignac number, because none of the positive numbers 2^k-811314905 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81131486 + ... + 81131495.

It is an arithmetic number, because the mean of its divisors is an integer number (243394473).

Almost surely, 2^811314905 is an apocalyptic number.

It is an amenable number.

811314905 is a deficient number, since it is larger than the sum of its proper divisors (162262987).

811314905 is a wasteful number, since it uses less digits than its factorization.

811314905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162262986.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 811314905 is about 28483.5901002665. The cubic root of 811314905 is about 932.6738884177.

The spelling of 811314905 in words is "eight hundred eleven million, three hundred fourteen thousand, nine hundred five".