30681047 has 2 divisors, whose sum is σ = 30681048. Its totient is φ = 30681046.

The previous prime is 30680999. The next prime is 30681061. The reversal of 30681047 is 74018603.

It is a strong prime.

It is an emirp because it is prime and its reverse (74018603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30681047 - 2⁶ = 30680983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30681247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15340523 + 15340524.

It is an arithmetic number, because the mean of its divisors is an integer number (15340524).

Almost surely, 2^30681047 is an apocalyptic number.

30681047 is a deficient number, since it is larger than the sum of its proper divisors (1).

30681047 is an equidigital number, since it uses as much as digits as its factorization.

30681047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 30681047 is about 5539.0474812913. The cubic root of 30681047 is about 313.0569804431.

The spelling of 30681047 in words is "thirty million, six hundred eighty-one thousand, forty-seven".