71684243 has 2 divisors, whose sum is σ = 71684244. Its totient is φ = 71684242.

The previous prime is 71684237. The next prime is 71684267. The reversal of 71684243 is 34248617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71684243 - 2¹⁴ = 71667859 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (71684273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35842121 + 35842122.

It is an arithmetic number, because the mean of its divisors is an integer number (35842122).

Almost surely, 2^71684243 is an apocalyptic number.

71684243 is a deficient number, since it is larger than the sum of its proper divisors (1).

71684243 is an equidigital number, since it uses as much as digits as its factorization.

71684243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 35.

The square root of 71684243 is about 8466.6547703328. The cubic root of 71684243 is about 415.4077243229.

It can be divided in two parts, 7168 and 4243, that added together give a palindrome (11411).

The spelling of 71684243 in words is "seventy-one million, six hundred eighty-four thousand, two hundred forty-three".