180985867 has 2 divisors, whose sum is σ = 180985868. Its totient is φ = 180985866.

The previous prime is 180985837. The next prime is 180985879. The reversal of 180985867 is 768589081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 180985867 - 2¹⁵ = 180953099 is a prime.

It is not a weakly prime, because it can be changed into another prime (180985837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90492933 + 90492934.

It is an arithmetic number, because the mean of its divisors is an integer number (90492934).

Almost surely, 2^180985867 is an apocalyptic number.

180985867 is a deficient number, since it is larger than the sum of its proper divisors (1).

180985867 is an equidigital number, since it uses as much as digits as its factorization.

180985867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 52.

The square root of 180985867 is about 13453.0987880116. The cubic root of 180985867 is about 565.6505592756.

The spelling of 180985867 in words is "one hundred eighty million, nine hundred eighty-five thousand, eight hundred sixty-seven".