180198943 has 2 divisors, whose sum is σ = 180198944. Its totient is φ = 180198942.

The previous prime is 180198919. The next prime is 180199003. The reversal of 180198943 is 349891081.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180198943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 180198943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180198913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90099471 + 90099472.

It is an arithmetic number, because the mean of its divisors is an integer number (90099472).

Almost surely, 2^180198943 is an apocalyptic number.

180198943 is a deficient number, since it is larger than the sum of its proper divisors (1).

180198943 is an equidigital number, since it uses as much as digits as its factorization.

180198943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 180198943 is about 13423.8199853842. The cubic root of 180198943 is about 564.8295546636.

It can be divided in two parts, 18019 and 8943, that added together give a palindrome (26962).

The spelling of 180198943 in words is "one hundred eighty million, one hundred ninety-eight thousand, nine hundred forty-three".