813000771 has 24 divisors (see below), whose sum is σ = 1297320960. Its totient is φ = 486486000.

The previous prime is 813000743. The next prime is 813000791. The reversal of 813000771 is 177000318.

It is not a de Polignac number, because 813000771 - 2¹⁸ = 812738627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (813000701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44155 + ... + 59796.

It is an arithmetic number, because the mean of its divisors is an integer number (54055040).

Almost surely, 2^813000771 is an apocalyptic number.

813000771 is a deficient number, since it is larger than the sum of its proper divisors (484320189).

813000771 is a wasteful number, since it uses less digits than its factorization.

813000771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104047 (or 104044 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 813000771 is about 28513.1683788386. The cubic root of 813000771 is about 933.3194558169.

The spelling of 813000771 in words is "eight hundred thirteen million, seven hundred seventy-one", and thus it is an aban number.