30688019 has 2 divisors, whose sum is σ = 30688020. Its totient is φ = 30688018.

The previous prime is 30687997. The next prime is 30688037. The reversal of 30688019 is 91088603.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30688019 - 2¹⁶ = 30622483 is a prime.

It is a super-2 number, since 2×30688019² = 1883509020288722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30688019.

It is not a weakly prime, because it can be changed into another prime (30688079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15344009 + 15344010.

It is an arithmetic number, because the mean of its divisors is an integer number (15344010).

Almost surely, 2^30688019 is an apocalyptic number.

30688019 is a deficient number, since it is larger than the sum of its proper divisors (1).

30688019 is an equidigital number, since it uses as much as digits as its factorization.

30688019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 30688019 is about 5539.6767956263. The cubic root of 30688019 is about 313.0806918021.

The spelling of 30688019 in words is "thirty million, six hundred eighty-eight thousand, nineteen".