30503509 has 2 divisors, whose sum is σ = 30503510. Its totient is φ = 30503508.

The previous prime is 30503507. The next prime is 30503527. The reversal of 30503509 is 90530503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30492484 + 11025 = 5522^2 + 105^2 .

It is a cyclic number.

It is not a de Polignac number, because 30503509 - 2¹ = 30503507 is a prime.

It is a super-2 number, since 2×30503509² = 1860928122626162, which contains 22 as substring.

Together with 30503507, 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 (30503507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15251754 + 15251755.

It is an arithmetic number, because the mean of its divisors is an integer number (15251755).

Almost surely, 2^30503509 is an apocalyptic number.

It is an amenable number.

30503509 is a deficient number, since it is larger than the sum of its proper divisors (1).

30503509 is an equidigital number, since it uses as much as digits as its factorization.

30503509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2025, while the sum is 25.

The square root of 30503509 is about 5522.9981893895. The cubic root of 30503509 is about 312.4519700050.

The spelling of 30503509 in words is "thirty million, five hundred three thousand, five hundred nine".