812953 has 4 divisors (see below), whose sum is σ = 855760. Its totient is φ = 770148.

The previous prime is 812939. The next prime is 812963. The reversal of 812953 is 359218.

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 a cyclic number.

It is not a de Polignac number, because 812953 - 2⁵ = 812921 is a prime.

812953 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (812963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21375 + ... + 21412.

It is an arithmetic number, because the mean of its divisors is an integer number (213940).

2⁸¹²⁹⁵³ is an apocalyptic number.

It is an amenable number.

812953 is a deficient number, since it is larger than the sum of its proper divisors (42807).

812953 is a wasteful number, since it uses less digits than its factorization.

812953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42806.

The product of its digits is 2160, while the sum is 28.

The square root of 812953 is about 901.6390630402. The cubic root of 812953 is about 93.3301175196.

The spelling of 812953 in words is "eight hundred twelve thousand, nine hundred fifty-three".