180243901 has 2 divisors, whose sum is σ = 180243902. Its totient is φ = 180243900.

The previous prime is 180243883. The next prime is 180243929. The reversal of 180243901 is 109342081.

It is a happy number.

It is an a-pointer prime, because the next prime (180243929) can be obtained adding 180243901 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178356025 + 1887876 = 13355^2 + 1374^2 .

It is a cyclic number.

It is not a de Polignac number, because 180243901 - 2²⁷ = 46026173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 180243901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180243991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90121950 + 90121951.

It is an arithmetic number, because the mean of its divisors is an integer number (90121951).

Almost surely, 2^180243901 is an apocalyptic number.

It is an amenable number.

180243901 is a deficient number, since it is larger than the sum of its proper divisors (1).

180243901 is an equidigital number, since it uses as much as digits as its factorization.

180243901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 180243901 is about 13425.4944415467. The cubic root of 180243901 is about 564.8765240393.

Adding to 180243901 its reverse (109342081), we get a palindrome (289585982).

The spelling of 180243901 in words is "one hundred eighty million, two hundred forty-three thousand, nine hundred one".