71168729 has 2 divisors, whose sum is σ = 71168730. Its totient is φ = 71168728.

The previous prime is 71168689. The next prime is 71168731. The reversal of 71168729 is 92786117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54169600 + 16999129 = 7360^2 + 4123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71168729 is a prime.

Together with 71168731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71168759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35584364 + 35584365.

It is an arithmetic number, because the mean of its divisors is an integer number (35584365).

Almost surely, 2^71168729 is an apocalyptic number.

It is an amenable number.

71168729 is a deficient number, since it is larger than the sum of its proper divisors (1).

71168729 is an equidigital number, since it uses as much as digits as its factorization.

71168729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 41.

The square root of 71168729 is about 8436.1560559297. The cubic root of 71168729 is about 414.4095323638.

The spelling of 71168729 in words is "seventy-one million, one hundred sixty-eight thousand, seven hundred twenty-nine".