185518349 has 2 divisors, whose sum is σ = 185518350. Its totient is φ = 185518348.

The previous prime is 185518343. The next prime is 185518351. The reversal of 185518349 is 943815581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157502500 + 28015849 = 12550^2 + 5293^2 .

It is a cyclic number.

It is not a de Polignac number, because 185518349 - 2¹² = 185514253 is a prime.

Together with 185518351, 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 (185518343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92759174 + 92759175.

It is an arithmetic number, because the mean of its divisors is an integer number (92759175).

Almost surely, 2^185518349 is an apocalyptic number.

It is an amenable number.

185518349 is a deficient number, since it is larger than the sum of its proper divisors (1).

185518349 is an equidigital number, since it uses as much as digits as its factorization.

185518349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 44.

The square root of 185518349 is about 13620.5120682007. The cubic root of 185518349 is about 570.3335987075. Note that the first 3 decimals are identical.

The spelling of 185518349 in words is "one hundred eighty-five million, five hundred eighteen thousand, three hundred forty-nine".