180868013 has 2 divisors, whose sum is σ = 180868014. Its totient is φ = 180868012.

The previous prime is 180868007. The next prime is 180868057. The reversal of 180868013 is 310868081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126742564 + 54125449 = 11258^2 + 7357^2 .

It is a cyclic number.

It is not a de Polignac number, because 180868013 - 2⁶ = 180867949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180868003) 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, 90434006 + 90434007.

It is an arithmetic number, because the mean of its divisors is an integer number (90434007).

Almost surely, 2^180868013 is an apocalyptic number.

It is an amenable number.

180868013 is a deficient number, since it is larger than the sum of its proper divisors (1).

180868013 is an equidigital number, since it uses as much as digits as its factorization.

180868013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 180868013 is about 13448.7178942827. The cubic root of 180868013 is about 565.5277528977.

The spelling of 180868013 in words is "one hundred eighty million, eight hundred sixty-eight thousand, thirteen".