180000869 has 2 divisors, whose sum is σ = 180000870. Its totient is φ = 180000868.

The previous prime is 180000859. The next prime is 180000901. The reversal of 180000869 is 968000081.

180000869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (180000901) can be obtained adding 180000869 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139830625 + 40170244 = 11825^2 + 6338^2 .

It is an emirp because it is prime and its reverse (968000081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180000869 - 2¹⁶ = 179935333 is a prime.

It is a super-2 number, since 2×180000869² = 64800625681510322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180000839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90000434 + 90000435.

It is an arithmetic number, because the mean of its divisors is an integer number (90000435).

Almost surely, 2^180000869 is an apocalyptic number.

It is an amenable number.

180000869 is a deficient number, since it is larger than the sum of its proper divisors (1).

180000869 is an equidigital number, since it uses as much as digits as its factorization.

180000869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 180000869 is about 13416.4402506775. The cubic root of 180000869 is about 564.6225259497.

The spelling of 180000869 in words is "one hundred eighty million, eight hundred sixty-nine", and thus it is an aban number.