30338681 has 2 divisors, whose sum is σ = 30338682. Its totient is φ = 30338680.

The previous prime is 30338663. The next prime is 30338689. The reversal of 30338681 is 18683303.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27920656 + 2418025 = 5284^2 + 1555^2 .

It is a cyclic number.

It is not a de Polignac number, because 30338681 - 2⁶ = 30338617 is a prime.

It is a super-2 number, since 2×30338681² = 1840871129639522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30338689) 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, 15169340 + 15169341.

It is an arithmetic number, because the mean of its divisors is an integer number (15169341).

Almost surely, 2^30338681 is an apocalyptic number.

It is an amenable number.

30338681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30338681 is an equidigital number, since it uses as much as digits as its factorization.

30338681 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 32.

The square root of 30338681 is about 5508.0560091560. The cubic root of 30338681 is about 311.8881673765. Note that the first 3 decimals are identical.

The spelling of 30338681 in words is "thirty million, three hundred thirty-eight thousand, six hundred eighty-one".