812923911 has 64 divisors (see below), whose sum is σ = 1337472000. Its totient is φ = 485896320.

The previous prime is 812923897. The next prime is 812923927. The reversal of 812923911 is 119329218.

It is not a de Polignac number, because 812923911 - 2⁹ = 812923399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812923981) 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 63 ways as a sum of consecutive naturals, for example, 787966 + ... + 788996.

It is an arithmetic number, because the mean of its divisors is an integer number (20898000).

Almost surely, 2^812923911 is an apocalyptic number.

812923911 is a deficient number, since it is larger than the sum of its proper divisors (524548089).

812923911 is a wasteful number, since it uses less digits than its factorization.

812923911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1135 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 812923911 is about 28511.8205486777. The cubic root of 812923911 is about 933.2900433011.

The spelling of 812923911 in words is "eight hundred twelve million, nine hundred twenty-three thousand, nine hundred eleven".