71947 has 2 divisors, whose sum is σ = 71948. Its totient is φ = 71946.

The previous prime is 71941. The next prime is 71963. The reversal of 71947 is 74917.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71947 - 2¹¹ = 69899 is a prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (71941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35973 + 35974.

It is an arithmetic number, because the mean of its divisors is an integer number (35974).

2⁷¹⁹⁴⁷ is an apocalyptic number.

71947 is a deficient number, since it is larger than the sum of its proper divisors (1).

71947 is an equidigital number, since it uses as much as digits as its factorization.

71947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 28.

The square root of 71947 is about 268.2293794498. The cubic root of 71947 is about 41.5914661366.

The spelling of 71947 in words is "seventy-one thousand, nine hundred forty-seven".