812533313 has 2 divisors, whose sum is σ = 812533314. Its totient is φ = 812533312.

The previous prime is 812533279. The next prime is 812533327. The reversal of 812533313 is 313335218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 811509169 + 1024144 = 28487^2 + 1012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812533313 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (812533363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406266656 + 406266657.

It is an arithmetic number, because the mean of its divisors is an integer number (406266657).

Almost surely, 2^812533313 is an apocalyptic number.

It is an amenable number.

812533313 is a deficient number, since it is larger than the sum of its proper divisors (1).

812533313 is an equidigital number, since it uses as much as digits as its factorization.

812533313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 812533313 is about 28504.9699701649. The cubic root of 812533313 is about 933.1405419679.

The spelling of 812533313 in words is "eight hundred twelve million, five hundred thirty-three thousand, three hundred thirteen".