180818969 has 2 divisors, whose sum is σ = 180818970. Its totient is φ = 180818968.

The previous prime is 180818933. The next prime is 180819007. The reversal of 180818969 is 969818081.

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., 140114569 + 40704400 = 11837^2 + 6380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180818969 is a prime.

It is a super-2 number, since 2×180818969² = 65390999100445922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (180818909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90409484 + 90409485.

It is an arithmetic number, because the mean of its divisors is an integer number (90409485).

Almost surely, 2^180818969 is an apocalyptic number.

It is an amenable number.

180818969 is a deficient number, since it is larger than the sum of its proper divisors (1).

180818969 is an equidigital number, since it uses as much as digits as its factorization.

180818969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 180818969 is about 13446.8943998233. The cubic root of 180818969 is about 565.4766322859.

The spelling of 180818969 in words is "one hundred eighty million, eight hundred eighteen thousand, nine hundred sixty-nine".