305214109 has 2 divisors, whose sum is σ = 305214110. Its totient is φ = 305214108.

The previous prime is 305214059. The next prime is 305214113. The reversal of 305214109 is 901412503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284765625 + 20448484 = 16875^2 + 4522^2 .

It is a cyclic number.

It is not a de Polignac number, because 305214109 - 2¹³ = 305205917 is a prime.

It is a super-3 number, since 3×305214109³ (a number of 26 digits) contains 333 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305214179) 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, 152607054 + 152607055.

It is an arithmetic number, because the mean of its divisors is an integer number (152607055).

Almost surely, 2^305214109 is an apocalyptic number.

It is an amenable number.

305214109 is a deficient number, since it is larger than the sum of its proper divisors (1).

305214109 is an equidigital number, since it uses as much as digits as its factorization.

305214109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 305214109 is about 17470.3780439921. The cubic root of 305214109 is about 673.2890249302.

It can be divided in two parts, 3052 and 14109, that added together give a square (17161 = 131²).

The spelling of 305214109 in words is "three hundred five million, two hundred fourteen thousand, one hundred nine".