30724709 has 2 divisors, whose sum is σ = 30724710. Its totient is φ = 30724708.

The previous prime is 30724679. The next prime is 30724721. The reversal of 30724709 is 90742703.

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., 17056900 + 13667809 = 4130^2 + 3697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30724709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30724769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15362354 + 15362355.

It is an arithmetic number, because the mean of its divisors is an integer number (15362355).

Almost surely, 2^30724709 is an apocalyptic number.

It is an amenable number.

30724709 is a deficient number, since it is larger than the sum of its proper divisors (1).

30724709 is an equidigital number, since it uses as much as digits as its factorization.

30724709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 30724709 is about 5542.9873714451. The cubic root of 30724709 is about 313.2054131771.

The spelling of 30724709 in words is "thirty million, seven hundred twenty-four thousand, seven hundred nine".