30986947 has 2 divisors, whose sum is σ = 30986948. Its totient is φ = 30986946.

The previous prime is 30986909. The next prime is 30986981. The reversal of 30986947 is 74968903.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30986947 - 2¹⁵ = 30954179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30986897 and 30986906.

It is not a weakly prime, because it can be changed into another prime (30986047) 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, 15493473 + 15493474.

It is an arithmetic number, because the mean of its divisors is an integer number (15493474).

Almost surely, 2^30986947 is an apocalyptic number.

30986947 is a deficient number, since it is larger than the sum of its proper divisors (1).

30986947 is an equidigital number, since it uses as much as digits as its factorization.

30986947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 30986947 is about 5566.5920454080. The cubic root of 30986947 is about 314.0939682519.

The spelling of 30986947 in words is "thirty million, nine hundred eighty-six thousand, nine hundred forty-seven".