812310093 has 64 divisors (see below), whose sum is σ = 1413120000. Its totient is φ = 460975536.

The previous prime is 812310091. The next prime is 812310101. The reversal of 812310093 is 390013218.

It is not a de Polignac number, because 812310093 - 2¹ = 812310091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812310091) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2213196 + ... + 2213562.

It is an arithmetic number, because the mean of its divisors is an integer number (22080000).

Almost surely, 2^812310093 is an apocalyptic number.

It is an amenable number.

812310093 is a deficient number, since it is larger than the sum of its proper divisors (600809907).

812310093 is a wasteful number, since it uses less digits than its factorization.

812310093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 812310093 is about 28501.0542436591. The cubic root of 812310093 is about 933.0550830270.

The spelling of 812310093 in words is "eight hundred twelve million, three hundred ten thousand, ninety-three".