180100061 has 2 divisors, whose sum is σ = 180100062. Its totient is φ = 180100060.

The previous prime is 180100043. The next prime is 180100139. The reversal of 180100061 is 160001081.

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., 168844036 + 11256025 = 12994^2 + 3355^2 .

It is an emirp because it is prime and its reverse (160001081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 180100061 - 2²² = 175905757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180100561) 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, 90050030 + 90050031.

It is an arithmetic number, because the mean of its divisors is an integer number (90050031).

Almost surely, 2^180100061 is an apocalyptic number.

It is an amenable number.

180100061 is a deficient number, since it is larger than the sum of its proper divisors (1).

180100061 is an equidigital number, since it uses as much as digits as its factorization.

180100061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 180100061 is about 13420.1364002010. The cubic root of 180100061 is about 564.7262212882.

The spelling of 180100061 in words is "one hundred eighty million, one hundred thousand, sixty-one".