811138293 has 40 divisors (see below), whose sum is σ = 1404374400. Its totient is φ = 456956640.

The previous prime is 811138261. The next prime is 811138331. The reversal of 811138293 is 392831118.

It is not a de Polignac number, because 811138293 - 2⁵ = 811138261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811138243) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 30183 + ... + 50331.

It is an arithmetic number, because the mean of its divisors is an integer number (35109360).

Almost surely, 2^811138293 is an apocalyptic number.

It is an amenable number.

811138293 is a deficient number, since it is larger than the sum of its proper divisors (593236107).

811138293 is a wasteful number, since it uses less digits than its factorization.

811138293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20239 (or 20230 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 811138293 is about 28480.4896903126. The cubic root of 811138293 is about 932.6062067840.

The spelling of 811138293 in words is "eight hundred eleven million, one hundred thirty-eight thousand, two hundred ninety-three".