71816473 has 2 divisors, whose sum is σ = 71816474. Its totient is φ = 71816472.

The previous prime is 71816467. The next prime is 71816527. The reversal of 71816473 is 37461817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70761744 + 1054729 = 8412^2 + 1027^2 .

It is an emirp because it is prime and its reverse (37461817) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71816473 is a prime.

It is not a weakly prime, because it can be changed into another prime (71816443) 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, 35908236 + 35908237.

It is an arithmetic number, because the mean of its divisors is an integer number (35908237).

Almost surely, 2^71816473 is an apocalyptic number.

It is an amenable number.

71816473 is a deficient number, since it is larger than the sum of its proper divisors (1).

71816473 is an equidigital number, since it uses as much as digits as its factorization.

71816473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 37.

The square root of 71816473 is about 8474.4600417962. The cubic root of 71816473 is about 415.6629901996.

The spelling of 71816473 in words is "seventy-one million, eight hundred sixteen thousand, four hundred seventy-three".