30724902809 has 2 divisors, whose sum is σ = 30724902810. Its totient is φ = 30724902808.

The previous prime is 30724902707. The next prime is 30724902811. The reversal of 30724902809 is 90820942703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20859447184 + 9865455625 = 144428^2 + 99325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30724902809 is a prime.

Together with 30724902811, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30724902809.

It is not a weakly prime, because it can be changed into another prime (30724902829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15362451404 + 15362451405.

It is an arithmetic number, because the mean of its divisors is an integer number (15362451405).

Almost surely, 2^30724902809 is an apocalyptic number.

It is an amenable number.

30724902809 is a deficient number, since it is larger than the sum of its proper divisors (1).

30724902809 is an equidigital number, since it uses as much as digits as its factorization.

30724902809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 30724902809 in words is "thirty billion, seven hundred twenty-four million, nine hundred two thousand, eight hundred nine".