306149 has 2 divisors, whose sum is σ = 306150. Its totient is φ = 306148.

The previous prime is 306139. The next prime is 306157. The reversal of 306149 is 941603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240100 + 66049 = 490^2 + 257^2 .

It is a cyclic number.

It is not a de Polignac number, because 306149 - 2⁴ = 306133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153074 + 153075.

It is an arithmetic number, because the mean of its divisors is an integer number (153075).

2³⁰⁶¹⁴⁹ is an apocalyptic number.

It is an amenable number.

306149 is a deficient number, since it is larger than the sum of its proper divisors (1).

306149 is an equidigital number, since it uses as much as digits as its factorization.

306149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 306149 is about 553.3073287062. The cubic root of 306149 is about 67.3975767164.

The spelling of 306149 in words is "three hundred six thousand, one hundred forty-nine".