306540349 has 2 divisors, whose sum is σ = 306540350. Its totient is φ = 306540348.

The previous prime is 306540347. The next prime is 306540391. The reversal of 306540349 is 943045603.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 291384900 + 15155449 = 17070^2 + 3893^2 .

It is a cyclic number.

It is not a de Polignac number, because 306540349 - 2¹ = 306540347 is a prime.

Together with 306540347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306540347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153270174 + 153270175.

It is an arithmetic number, because the mean of its divisors is an integer number (153270175).

Almost surely, 2^306540349 is an apocalyptic number.

It is an amenable number.

306540349 is a deficient number, since it is larger than the sum of its proper divisors (1).

306540349 is an equidigital number, since it uses as much as digits as its factorization.

306540349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 306540349 is about 17508.2937204058. The cubic root of 306540349 is about 674.2628250287.

The spelling of 306540349 in words is "three hundred six million, five hundred forty thousand, three hundred forty-nine".