71598643 has 2 divisors, whose sum is σ = 71598644. Its totient is φ = 71598642.

The previous prime is 71598641. The next prime is 71598691. The reversal of 71598643 is 34689517.

It is a weak prime.

It is an emirp because it is prime and its reverse (34689517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71598643 - 2¹ = 71598641 is a prime.

Together with 71598641, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 71598643.

It is not a weakly prime, because it can be changed into another prime (71598641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35799321 + 35799322.

It is an arithmetic number, because the mean of its divisors is an integer number (35799322).

Almost surely, 2^71598643 is an apocalyptic number.

71598643 is a deficient number, since it is larger than the sum of its proper divisors (1).

71598643 is an equidigital number, since it uses as much as digits as its factorization.

71598643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 71598643 is about 8461.5981351043. The cubic root of 71598643 is about 415.2423087771.

The spelling of 71598643 in words is "seventy-one million, five hundred ninety-eight thousand, six hundred forty-three".