181297 has 2 divisors, whose sum is σ = 181298. Its totient is φ = 181296.

The previous prime is 181283. The next prime is 181301. The reversal of 181297 is 792181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179776 + 1521 = 424^2 + 39^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181297 is a prime.

It is not a weakly prime, because it can be changed into another prime (181277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90648 + 90649.

It is an arithmetic number, because the mean of its divisors is an integer number (90649).

2¹⁸¹²⁹⁷ is an apocalyptic number.

It is an amenable number.

181297 is a deficient number, since it is larger than the sum of its proper divisors (1).

181297 is an equidigital number, since it uses as much as digits as its factorization.

181297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 28.

The square root of 181297 is about 425.7898542709. The cubic root of 181297 is about 56.5974510541.

The spelling of 181297 in words is "one hundred eighty-one thousand, two hundred ninety-seven".