181363069 has 2 divisors, whose sum is σ = 181363070. Its totient is φ = 181363068.

The previous prime is 181363067. The next prime is 181363111. The reversal of 181363069 is 960363181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180579844 + 783225 = 13438^2 + 885^2 .

It is an emirp because it is prime and its reverse (960363181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 181363069 - 2¹ = 181363067 is a prime.

It is a super-2 number, since 2×181363069² = 65785125594197522, which contains 22 as substring.

Together with 181363067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181363067) 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, 90681534 + 90681535.

It is an arithmetic number, because the mean of its divisors is an integer number (90681535).

Almost surely, 2^181363069 is an apocalyptic number.

It is an amenable number.

181363069 is a deficient number, since it is larger than the sum of its proper divisors (1).

181363069 is an equidigital number, since it uses as much as digits as its factorization.

181363069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 181363069 is about 13467.1106403712. The cubic root of 181363069 is about 566.0432537793.

The spelling of 181363069 in words is "one hundred eighty-one million, three hundred sixty-three thousand, sixty-nine".