815384161 has 2 divisors, whose sum is σ = 815384162. Its totient is φ = 815384160.

The previous prime is 815384159. The next prime is 815384197. The reversal of 815384161 is 161483518.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 715883536 + 99500625 = 26756^2 + 9975^2 .

It is a cyclic number.

It is not a de Polignac number, because 815384161 - 2¹ = 815384159 is a prime.

Together with 815384159, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 815384161.

It is not a weakly prime, because it can be changed into another prime (815384761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407692080 + 407692081.

It is an arithmetic number, because the mean of its divisors is an integer number (407692081).

Almost surely, 2^815384161 is an apocalyptic number.

It is an amenable number.

815384161 is a deficient number, since it is larger than the sum of its proper divisors (1).

815384161 is an equidigital number, since it uses as much as digits as its factorization.

815384161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 37.

The square root of 815384161 is about 28554.9323410160. The cubic root of 815384161 is about 934.2306046238.

The spelling of 815384161 in words is "eight hundred fifteen million, three hundred eighty-four thousand, one hundred sixty-one".