812236133 has 2 divisors, whose sum is σ = 812236134. Its totient is φ = 812236132.

The previous prime is 812236127. The next prime is 812236153. The reversal of 812236133 is 331632218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 552156004 + 260080129 = 23498^2 + 16127^2 .

It is a cyclic number.

It is not a de Polignac number, because 812236133 - 2⁶ = 812236069 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 812236096 and 812236105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812236123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406118066 + 406118067.

It is an arithmetic number, because the mean of its divisors is an integer number (406118067).

Almost surely, 2^812236133 is an apocalyptic number.

It is an amenable number.

812236133 is a deficient number, since it is larger than the sum of its proper divisors (1).

812236133 is an equidigital number, since it uses as much as digits as its factorization.

812236133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 812236133 is about 28499.7567182599. The cubic root of 812236133 is about 933.0267642651.

The spelling of 812236133 in words is "eight hundred twelve million, two hundred thirty-six thousand, one hundred thirty-three".