180144917 has 2 divisors, whose sum is σ = 180144918. Its totient is φ = 180144916.

The previous prime is 180144907. The next prime is 180144919. The reversal of 180144917 is 719441081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130667761 + 49477156 = 11431^2 + 7034^2 .

It is a cyclic number.

It is not a de Polignac number, because 180144917 - 2²⁰ = 179096341 is a prime.

It is a super-2 number, since 2×180144917² = 64904382241873778, which contains 22 as substring.

Together with 180144919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (180144919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90072458 + 90072459.

It is an arithmetic number, because the mean of its divisors is an integer number (90072459).

Almost surely, 2^180144917 is an apocalyptic number.

It is an amenable number.

180144917 is a deficient number, since it is larger than the sum of its proper divisors (1).

180144917 is an equidigital number, since it uses as much as digits as its factorization.

180144917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 180144917 is about 13421.8075161284. The cubic root of 180144917 is about 564.7731012587.

Adding to 180144917 its reverse (719441081), we get a palindrome (899585998).

The spelling of 180144917 in words is "one hundred eighty million, one hundred forty-four thousand, nine hundred seventeen".