30685873 has 2 divisors, whose sum is σ = 30685874. Its totient is φ = 30685872.

The previous prime is 30685871. The next prime is 30685883. The reversal of 30685873 is 37858603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29669809 + 1016064 = 5447^2 + 1008^2 .

It is a cyclic number.

It is not a de Polignac number, because 30685873 - 2¹ = 30685871 is a prime.

Together with 30685871, it forms a pair of twin primes.

It is equal to p_1897816 and since 30685873 and 1897816 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (30685871) 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, 15342936 + 15342937.

It is an arithmetic number, because the mean of its divisors is an integer number (15342937).

Almost surely, 2^30685873 is an apocalyptic number.

It is an amenable number.

30685873 is a deficient number, since it is larger than the sum of its proper divisors (1).

30685873 is an equidigital number, since it uses as much as digits as its factorization.

30685873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 30685873 is about 5539.4830986293. The cubic root of 30685873 is about 313.0733937659.

The spelling of 30685873 in words is "thirty million, six hundred eighty-five thousand, eight hundred seventy-three".