812930 has 8 divisors (see below), whose sum is σ = 1463292. Its totient is φ = 325168.

The previous prime is 812921. The next prime is 812939. The reversal of 812930 is 39218.

It is an interprime number because it is at equal distance from previous prime (812921) and next prime (812939).

It can be written as a sum of positive squares in 2 ways, for example, as 758641 + 54289 = 871^2 + 233^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 812896 and 812905.

It is not an unprimeable number, because it can be changed into a prime (812939) by changing a digit.

812930 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40637 + ... + 40656.

2⁸¹²⁹³⁰ is an apocalyptic number.

812930 is a deficient number, since it is larger than the sum of its proper divisors (650362).

812930 is a wasteful number, since it uses less digits than its factorization.

812930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81300.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 812930 is about 901.6263084005. The cubic root of 812930 is about 93.3292373486.

The spelling of 812930 in words is "eight hundred twelve thousand, nine hundred thirty".