30840449 has 2 divisors, whose sum is σ = 30840450. Its totient is φ = 30840448.

The previous prime is 30840389. The next prime is 30840457. The reversal of 30840449 is 94404803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30724849 + 115600 = 5543^2 + 340^2 .

It is an emirp because it is prime and its reverse (94404803) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30840449 is a prime.

It is a super-2 number, since 2×30840449² = 1902266589043202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30840149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15420224 + 15420225.

It is an arithmetic number, because the mean of its divisors is an integer number (15420225).

Almost surely, 2^30840449 is an apocalyptic number.

It is an amenable number.

30840449 is a deficient number, since it is larger than the sum of its proper divisors (1).

30840449 is an equidigital number, since it uses as much as digits as its factorization.

30840449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 30840449 is about 5553.4177764688. The cubic root of 30840449 is about 313.5982020463.

The spelling of 30840449 in words is "thirty million, eight hundred forty thousand, four hundred forty-nine".