30309449 has 2 divisors, whose sum is σ = 30309450. Its totient is φ = 30309448.

The previous prime is 30309371. The next prime is 30309451. The reversal of 30309449 is 94490303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18966025 + 11343424 = 4355^2 + 3368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30309449 is a prime.

Together with 30309451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30309479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15154724 + 15154725.

It is an arithmetic number, because the mean of its divisors is an integer number (15154725).

Almost surely, 2^30309449 is an apocalyptic number.

It is an amenable number.

30309449 is a deficient number, since it is larger than the sum of its proper divisors (1).

30309449 is an equidigital number, since it uses as much as digits as its factorization.

30309449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 30309449 is about 5505.4018018670. The cubic root of 30309449 is about 311.7879647709.

The spelling of 30309449 in words is "thirty million, three hundred nine thousand, four hundred forty-nine".