811478533 has 4 divisors (see below), whose sum is σ = 811544320. Its totient is φ = 811412748.

The previous prime is 811478501. The next prime is 811478539. The reversal of 811478533 is 335874118.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(811478533) divides (811478533-1)³.

It is a cyclic number.

It is not a de Polignac number, because 811478533 - 2⁵ = 811478501 is a prime.

It is a deceptive number, since it divides R_811478532.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811478539) 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 3 ways as a sum of consecutive naturals, for example, 8223 + ... + 41116.

It is an arithmetic number, because the mean of its divisors is an integer number (202886080).

It is a Poulet number, since it divides 2^811478532-1.

Almost surely, 2^811478533 is an apocalyptic number.

811478533 is the 16447-th octagonal number.

It is an amenable number.

811478533 is a deficient number, since it is larger than the sum of its proper divisors (65787).

811478533 is a wasteful number, since it uses less digits than its factorization.

811478533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65786.

The product of its digits is 80640, while the sum is 40.

The square root of 811478533 is about 28486.4622759654. The cubic root of 811478533 is about 932.7365855297.

The spelling of 811478533 in words is "eight hundred eleven million, four hundred seventy-eight thousand, five hundred thirty-three".