812319933 has 4 divisors (see below), whose sum is σ = 1083093248. Its totient is φ = 541546620.

The previous prime is 812319931. The next prime is 812319953. The reversal of 812319933 is 339913218.

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.

It is not a de Polignac number, because 812319933 - 2¹ = 812319931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 812319891 and 812319900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812319931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135386653 + ... + 135386658.

It is an arithmetic number, because the mean of its divisors is an integer number (270773312).

Almost surely, 2^812319933 is an apocalyptic number.

It is an amenable number.

812319933 is a deficient number, since it is larger than the sum of its proper divisors (270773315).

812319933 is a wasteful number, since it uses less digits than its factorization.

812319933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270773314.

The product of its digits is 34992, while the sum is 39.

The square root of 812319933 is about 28501.2268683297. The cubic root of 812319933 is about 933.0588505640.

The spelling of 812319933 in words is "eight hundred twelve million, three hundred nineteen thousand, nine hundred thirty-three".