30838681 has 2 divisors, whose sum is σ = 30838682. Its totient is φ = 30838680.

The previous prime is 30838673. The next prime is 30838727. The reversal of 30838681 is 18683803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23088025 + 7750656 = 4805^2 + 2784^2 .

It is an emirp because it is prime and its reverse (18683803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30838681 - 2³ = 30838673 is a prime.

It is a super-2 number, since 2×30838681² = 1902048491639522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30838681.

It is not a weakly prime, because it can be changed into another prime (30838081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15419340 + 15419341.

It is an arithmetic number, because the mean of its divisors is an integer number (15419341).

Almost surely, 2^30838681 is an apocalyptic number.

It is an amenable number.

30838681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30838681 is an equidigital number, since it uses as much as digits as its factorization.

30838681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 30838681 is about 5553.2585929344. The cubic root of 30838681 is about 313.5922093513.

The spelling of 30838681 in words is "thirty million, eight hundred thirty-eight thousand, six hundred eighty-one".