30405019 has 2 divisors, whose sum is σ = 30405020. Its totient is φ = 30405018.

The previous prime is 30405007. The next prime is 30405029. The reversal of 30405019 is 91050403.

It is a strong prime.

It is an emirp because it is prime and its reverse (91050403) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30405019 is a prime.

It is a super-2 number, since 2×30405019² = 1848930360780722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30405029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15202509 + 15202510.

It is an arithmetic number, because the mean of its divisors is an integer number (15202510).

Almost surely, 2^30405019 is an apocalyptic number.

30405019 is a deficient number, since it is larger than the sum of its proper divisors (1).

30405019 is an equidigital number, since it uses as much as digits as its factorization.

30405019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 30405019 is about 5514.0746277141. The cubic root of 30405019 is about 312.1153248611.

The spelling of 30405019 in words is "thirty million, four hundred five thousand, nineteen".