815384197 has 2 divisors, whose sum is σ = 815384198. Its totient is φ = 815384196.

The previous prime is 815384161. The next prime is 815384233. The reversal of 815384197 is 791483518.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (815384161) and next prime (815384233).

It can be written as a sum of positive squares in only one way, i.e., 741527361 + 73856836 = 27231^2 + 8594^2 .

It is a cyclic number.

It is not a de Polignac number, because 815384197 - 2¹¹ = 815382149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815384117) 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, 407692098 + 407692099.

It is an arithmetic number, because the mean of its divisors is an integer number (407692099).

Almost surely, 2^815384197 is an apocalyptic number.

It is an amenable number.

815384197 is a deficient number, since it is larger than the sum of its proper divisors (1).

815384197 is an equidigital number, since it uses as much as digits as its factorization.

815384197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The square root of 815384197 is about 28554.9329713799. The cubic root of 815384197 is about 934.2306183729.

The spelling of 815384197 in words is "eight hundred fifteen million, three hundred eighty-four thousand, one hundred ninety-seven".