71712169 has 2 divisors, whose sum is σ = 71712170. Its totient is φ = 71712168.

The previous prime is 71712163. The next prime is 71712181. The reversal of 71712169 is 96121717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56070144 + 15642025 = 7488^2 + 3955^2 .

It is a cyclic number.

It is not a de Polignac number, because 71712169 - 2²⁵ = 38157737 is a prime.

It is a super-3 number, since 3×71712169³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (71712163) 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, 35856084 + 35856085.

It is an arithmetic number, because the mean of its divisors is an integer number (35856085).

Almost surely, 2^71712169 is an apocalyptic number.

It is an amenable number.

71712169 is a deficient number, since it is larger than the sum of its proper divisors (1).

71712169 is an equidigital number, since it uses as much as digits as its factorization.

71712169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 34.

The square root of 71712169 is about 8468.3037852925. The cubic root of 71712169 is about 415.4616607229.

The spelling of 71712169 in words is "seventy-one million, seven hundred twelve thousand, one hundred sixty-nine".