71318243 has 2 divisors, whose sum is σ = 71318244. Its totient is φ = 71318242.

The previous prime is 71318237. The next prime is 71318263. The reversal of 71318243 is 34281317.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71318243 - 2¹⁰ = 71317219 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71318263) 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, 35659121 + 35659122.

It is an arithmetic number, because the mean of its divisors is an integer number (35659122).

Almost surely, 2^71318243 is an apocalyptic number.

71318243 is a deficient number, since it is larger than the sum of its proper divisors (1).

71318243 is an equidigital number, since it uses as much as digits as its factorization.

71318243 is an odious number, because the sum of its binary digits is odd.

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

The square root of 71318243 is about 8445.0129070357. The cubic root of 71318243 is about 414.6995318666.

The spelling of 71318243 in words is "seventy-one million, three hundred eighteen thousand, two hundred forty-three".