305085149 has 4 divisors (see below), whose sum is σ = 305175036. Its totient is φ = 304995264.

The previous prime is 305085139. The next prime is 305085181. The reversal of 305085149 is 941580503.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 272481049 + 32604100 = 16507^2 + 5710^2 .

It is a cyclic number.

It is not a de Polignac number, because 305085149 - 2²⁰ = 304036573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305085139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39644 + ... + 46709.

It is an arithmetic number, because the mean of its divisors is an integer number (76293759).

Almost surely, 2^305085149 is an apocalyptic number.

It is an amenable number.

305085149 is a deficient number, since it is larger than the sum of its proper divisors (89887).

305085149 is an equidigital number, since it uses as much as digits as its factorization.

305085149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89886.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 305085149 is about 17466.6868352301. The cubic root of 305085149 is about 673.1941848580.

The spelling of 305085149 in words is "three hundred five million, eighty-five thousand, one hundred forty-nine".