30836681 has 2 divisors, whose sum is σ = 30836682. Its totient is φ = 30836680.

The previous prime is 30836669. The next prime is 30836693. The reversal of 30836681 is 18663803.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (30836669) and next prime (30836693).

It can be written as a sum of positive squares in only one way, i.e., 28526281 + 2310400 = 5341^2 + 1520^2 .

It is an emirp because it is prime and its reverse (18663803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30836681 - 2¹⁰ = 30835657 is a prime.

It is a super-2 number, since 2×30836681² = 1901801790191522, 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 (30836621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15418340 + 15418341.

It is an arithmetic number, because the mean of its divisors is an integer number (15418341).

Almost surely, 2^30836681 is an apocalyptic number.

It is an amenable number.

30836681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30836681 is an equidigital number, since it uses as much as digits as its factorization.

30836681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 30836681 is about 5553.0785155623. The cubic root of 30836681 is about 313.5854300084.

The spelling of 30836681 in words is "thirty million, eight hundred thirty-six thousand, six hundred eighty-one".