812138273 has 8 divisors (see below), whose sum is σ = 821940480. Its totient is φ = 802370800.

The previous prime is 812138269. The next prime is 812138309. The reversal of 812138273 is 372831218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 812138273 - 2² = 812138269 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812138233) 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 7 ways as a sum of consecutive naturals, for example, 39986 + ... + 56772.

It is an arithmetic number, because the mean of its divisors is an integer number (102742560).

Almost surely, 2^812138273 is an apocalyptic number.

It is an amenable number.

812138273 is a deficient number, since it is larger than the sum of its proper divisors (9802207).

812138273 is a wasteful number, since it uses less digits than its factorization.

812138273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17367.

The product of its digits is 16128, while the sum is 35.

The square root of 812138273 is about 28498.0398097834. The cubic root of 812138273 is about 932.9892917196.

The spelling of 812138273 in words is "eight hundred twelve million, one hundred thirty-eight thousand, two hundred seventy-three".