65447947 has 2 divisors, whose sum is σ = 65447948. Its totient is φ = 65447946.

The previous prime is 65447929. The next prime is 65447957. The reversal of 65447947 is 74974456.

65447947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65447947 - 2⁷ = 65447819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65447897 and 65447906.

It is not a weakly prime, because it can be changed into another prime (65447927) 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, 32723973 + 32723974.

It is an arithmetic number, because the mean of its divisors is an integer number (32723974).

Almost surely, 2^65447947 is an apocalyptic number.

65447947 is a deficient number, since it is larger than the sum of its proper divisors (1).

65447947 is an equidigital number, since it uses as much as digits as its factorization.

65447947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 46.

The square root of 65447947 is about 8089.9905438758. The cubic root of 65447947 is about 402.9940889108.

The spelling of 65447947 in words is "sixty-five million, four hundred forty-seven thousand, nine hundred forty-seven".