309006149 has 2 divisors, whose sum is σ = 309006150. Its totient is φ = 309006148.

The previous prime is 309006143. The next prime is 309006151. The reversal of 309006149 is 941600903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303003649 + 6002500 = 17407^2 + 2450^2 .

It is an emirp because it is prime and its reverse (941600903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 309006149 - 2⁴ = 309006133 is a prime.

Together with 309006151, 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 (309006143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154503074 + 154503075.

It is an arithmetic number, because the mean of its divisors is an integer number (154503075).

Almost surely, 2^309006149 is an apocalyptic number.

It is an amenable number.

309006149 is a deficient number, since it is larger than the sum of its proper divisors (1).

309006149 is an equidigital number, since it uses as much as digits as its factorization.

309006149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 309006149 is about 17578.5707325710. The cubic root of 309006149 is about 676.0659146130.

The spelling of 309006149 in words is "three hundred nine million, six thousand, one hundred forty-nine".