381565297 has 2 divisors, whose sum is σ = 381565298. Its totient is φ = 381565296.

The previous prime is 381565279. The next prime is 381565307. The reversal of 381565297 is 792565183.

Together with previous prime (381565279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210714256 + 170851041 = 14516^2 + 13071^2 .

It is a cyclic number.

It is not a de Polignac number, because 381565297 - 2⁷ = 381565169 is a prime.

It is not a weakly prime, because it can be changed into another prime (381565097) 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, 190782648 + 190782649.

It is an arithmetic number, because the mean of its divisors is an integer number (190782649).

Almost surely, 2^381565297 is an apocalyptic number.

It is an amenable number.

381565297 is a deficient number, since it is larger than the sum of its proper divisors (1).

381565297 is an equidigital number, since it uses as much as digits as its factorization.

381565297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 46.

The square root of 381565297 is about 19533.6964499810. The cubic root of 381565297 is about 725.3088162006.

The spelling of 381565297 in words is "three hundred eighty-one million, five hundred sixty-five thousand, two hundred ninety-seven".