810440849 has 2 divisors, whose sum is σ = 810440850. Its totient is φ = 810440848.

The previous prime is 810440819. The next prime is 810440879. The reversal of 810440849 is 948044018.

It is a balanced prime because it is at equal distance from previous prime (810440819) and next prime (810440879).

It can be written as a sum of positive squares in only one way, i.e., 809800849 + 640000 = 28457^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 810440849 - 2⁸ = 810440593 is a prime.

It is not a weakly prime, because it can be changed into another prime (810440819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405220424 + 405220425.

It is an arithmetic number, because the mean of its divisors is an integer number (405220425).

Almost surely, 2^810440849 is an apocalyptic number.

It is an amenable number.

810440849 is a deficient number, since it is larger than the sum of its proper divisors (1).

810440849 is an equidigital number, since it uses as much as digits as its factorization.

810440849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 810440849 is about 28468.2428154602. The cubic root of 810440849 is about 932.3388347375.

The spelling of 810440849 in words is "eight hundred ten million, four hundred forty thousand, eight hundred forty-nine".