306439349 has 2 divisors, whose sum is σ = 306439350. Its totient is φ = 306439348.

The previous prime is 306439339. The next prime is 306439361. The reversal of 306439349 is 943934603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305620324 + 819025 = 17482^2 + 905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-306439349 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306439319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153219674 + 153219675.

It is an arithmetic number, because the mean of its divisors is an integer number (153219675).

Almost surely, 2^306439349 is an apocalyptic number.

It is an amenable number.

306439349 is a deficient number, since it is larger than the sum of its proper divisors (1).

306439349 is an equidigital number, since it uses as much as digits as its factorization.

306439349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 41.

The square root of 306439349 is about 17505.4091354644. The cubic root of 306439349 is about 674.1887640595.

The spelling of 306439349 in words is "three hundred six million, four hundred thirty-nine thousand, three hundred forty-nine".