30496681 has 2 divisors, whose sum is σ = 30496682. Its totient is φ = 30496680.

The previous prime is 30496679. The next prime is 30496709. The reversal of 30496681 is 18669403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27920656 + 2576025 = 5284^2 + 1605^2 .

It is an emirp because it is prime and its reverse (18669403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30496681 - 2¹ = 30496679 is a prime.

It is a super-2 number, since 2×30496681² = 1860095104031522, which contains 22 as substring.

Together with 30496679, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 30496681.

It is not a weakly prime, because it can be changed into another prime (30496481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15248340 + 15248341.

It is an arithmetic number, because the mean of its divisors is an integer number (15248341).

Almost surely, 2^30496681 is an apocalyptic number.

It is an amenable number.

30496681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30496681 is an equidigital number, since it uses as much as digits as its factorization.

30496681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 30496681 is about 5522.3800122773. The cubic root of 30496681 is about 312.4286548595.

It can be divided in two parts, 3049 and 6681, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 30496681 in words is "thirty million, four hundred ninety-six thousand, six hundred eighty-one".