30689717 has 2 divisors, whose sum is σ = 30689718. Its totient is φ = 30689716.

The previous prime is 30689669. The next prime is 30689723. The reversal of 30689717 is 71798603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24344356 + 6345361 = 4934^2 + 2519^2 .

It is a cyclic number.

It is not a de Polignac number, because 30689717 - 2⁶ = 30689653 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 (30680717) 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, 15344858 + 15344859.

It is an arithmetic number, because the mean of its divisors is an integer number (15344859).

Almost surely, 2^30689717 is an apocalyptic number.

It is an amenable number.

30689717 is a deficient number, since it is larger than the sum of its proper divisors (1).

30689717 is an equidigital number, since it uses as much as digits as its factorization.

30689717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 30689717 is about 5539.8300515449. The cubic root of 30689717 is about 313.0864660557.

The spelling of 30689717 in words is "thirty million, six hundred eighty-nine thousand, seven hundred seventeen".