30739909 has 2 divisors, whose sum is σ = 30739910. Its totient is φ = 30739908.

The previous prime is 30739871. The next prime is 30739939. The reversal of 30739909 is 90993703.

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., 30636225 + 103684 = 5535^2 + 322^2 .

It is an emirp because it is prime and its reverse (90993703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30739909 - 2¹⁵ = 30707141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30739939) 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, 15369954 + 15369955.

It is an arithmetic number, because the mean of its divisors is an integer number (15369955).

Almost surely, 2^30739909 is an apocalyptic number.

It is an amenable number.

30739909 is a deficient number, since it is larger than the sum of its proper divisors (1).

30739909 is an equidigital number, since it uses as much as digits as its factorization.

30739909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 30739909 is about 5544.3583037174. The cubic root of 30739909 is about 313.2570538878.

The spelling of 30739909 in words is "thirty million, seven hundred thirty-nine thousand, nine hundred nine".