812849 has 2 divisors, whose sum is σ = 812850. Its totient is φ = 812848.

The previous prime is 812807. The next prime is 812857. The reversal of 812849 is 948218.

It is a happy number.

812849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 734449 + 78400 = 857^2 + 280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812849 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (812869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406424 + 406425.

It is an arithmetic number, because the mean of its divisors is an integer number (406425).

2⁸¹²⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

812849 is a deficient number, since it is larger than the sum of its proper divisors (1).

812849 is an equidigital number, since it uses as much as digits as its factorization.

812849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 32.

The square root of 812849 is about 901.5813884503. The cubic root of 812849 is about 93.3261374838.

It can be divided in two parts, 812 and 849, that added together give a palindrome (1661).

The spelling of 812849 in words is "eight hundred twelve thousand, eight hundred forty-nine".