71330173 has 2 divisors, whose sum is σ = 71330174. Its totient is φ = 71330172.

The previous prime is 71330137. The next prime is 71330177. The reversal of 71330173 is 37103317.

Together with previous prime (71330137) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71014329 + 315844 = 8427^2 + 562^2 .

It is an emirp because it is prime and its reverse (37103317) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71330173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71330177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35665086 + 35665087.

It is an arithmetic number, because the mean of its divisors is an integer number (35665087).

Almost surely, 2^71330173 is an apocalyptic number.

It is an amenable number.

71330173 is a deficient number, since it is larger than the sum of its proper divisors (1).

71330173 is an equidigital number, since it uses as much as digits as its factorization.

71330173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1323, while the sum is 25.

The square root of 71330173 is about 8445.7192115296. The cubic root of 71330173 is about 414.7226539990.

The spelling of 71330173 in words is "seventy-one million, three hundred thirty thousand, one hundred seventy-three".