812851157 has 2 divisors, whose sum is σ = 812851158. Its totient is φ = 812851156.

The previous prime is 812851139. The next prime is 812851219. The reversal of 812851157 is 751158218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 542610436 + 270240721 = 23294^2 + 16439^2 .

It is a cyclic number.

It is not a de Polignac number, because 812851157 - 2¹⁴ = 812834773 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812851157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812851057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406425578 + 406425579.

It is an arithmetic number, because the mean of its divisors is an integer number (406425579).

Almost surely, 2^812851157 is an apocalyptic number.

It is an amenable number.

812851157 is a deficient number, since it is larger than the sum of its proper divisors (1).

812851157 is an equidigital number, since it uses as much as digits as its factorization.

812851157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 38.

The square root of 812851157 is about 28510.5446633347. The cubic root of 812851157 is about 933.2622003470.

The spelling of 812851157 in words is "eight hundred twelve million, eight hundred fifty-one thousand, one hundred fifty-seven".