305404109 has 2 divisors, whose sum is σ = 305404110. Its totient is φ = 305404108.

The previous prime is 305404079. The next prime is 305404111. The reversal of 305404109 is 901404503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188980009 + 116424100 = 13747^2 + 10790^2 .

It is a cyclic number.

It is not a de Polignac number, because 305404109 - 2¹⁶ = 305338573 is a prime.

Together with 305404111, 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 (305404199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152702054 + 152702055.

It is an arithmetic number, because the mean of its divisors is an integer number (152702055).

Almost surely, 2^305404109 is an apocalyptic number.

It is an amenable number.

305404109 is a deficient number, since it is larger than the sum of its proper divisors (1).

305404109 is an equidigital number, since it uses as much as digits as its factorization.

305404109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 305404109 is about 17475.8149738431. The cubic root of 305404109 is about 673.4287065233.

The spelling of 305404109 in words is "three hundred five million, four hundred four thousand, one hundred nine".