71613643 has 2 divisors, whose sum is σ = 71613644. Its totient is φ = 71613642.

The previous prime is 71613617. The next prime is 71613671. The reversal of 71613643 is 34631617.

It is a weak prime.

It is an emirp because it is prime and its reverse (34631617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71613643 - 2¹³ = 71605451 is a prime.

It is not a weakly prime, because it can be changed into another prime (71613613) 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, 35806821 + 35806822.

It is an arithmetic number, because the mean of its divisors is an integer number (35806822).

Almost surely, 2^71613643 is an apocalyptic number.

71613643 is a deficient number, since it is larger than the sum of its proper divisors (1).

71613643 is an equidigital number, since it uses as much as digits as its factorization.

71613643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 71613643 is about 8462.4844460714. The cubic root of 71613643 is about 415.2713046698.

The spelling of 71613643 in words is "seventy-one million, six hundred thirteen thousand, six hundred forty-three".