308149 has 2 divisors, whose sum is σ = 308150. Its totient is φ = 308148.

The previous prime is 308141. The next prime is 308153. The reversal of 308149 is 941803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207025 + 101124 = 455^2 + 318^2 .

It is a cyclic number.

It is not a de Polignac number, because 308149 - 2³ = 308141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (308141) 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, 154074 + 154075.

It is an arithmetic number, because the mean of its divisors is an integer number (154075).

2³⁰⁸¹⁴⁹ is an apocalyptic number.

It is an amenable number.

308149 is a deficient number, since it is larger than the sum of its proper divisors (1).

308149 is an equidigital number, since it uses as much as digits as its factorization.

308149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 308149 is about 555.1117004712. Note that the first 3 decimals coincide. The cubic root of 308149 is about 67.5440224946.

The spelling of 308149 in words is "three hundred eight thousand, one hundred forty-nine".