812833253 has 4 divisors (see below), whose sum is σ = 813405888. Its totient is φ = 812260620.

The previous prime is 812833207. The next prime is 812833267. The reversal of 812833253 is 352338218.

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 a de Polignac number, because none of the positive numbers 2^k-812833253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812838253) 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, 284183 + ... + 287028.

It is an arithmetic number, because the mean of its divisors is an integer number (203351472).

Almost surely, 2^812833253 is an apocalyptic number.

It is an amenable number.

812833253 is a deficient number, since it is larger than the sum of its proper divisors (572635).

812833253 is a wasteful number, since it uses less digits than its factorization.

812833253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572634.

The product of its digits is 34560, while the sum is 35.

The square root of 812833253 is about 28510.2306725147. The cubic root of 812833253 is about 933.2553482318.

The spelling of 812833253 in words is "eight hundred twelve million, eight hundred thirty-three thousand, two hundred fifty-three".