71129117 has 2 divisors, whose sum is σ = 71129118. Its totient is φ = 71129116.

The previous prime is 71129089. The next prime is 71129153. The reversal of 71129117 is 71192117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45616516 + 25512601 = 6754^2 + 5051^2 .

It is an emirp because it is prime and its reverse (71192117) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71129117 - 2¹⁰ = 71128093 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71129117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71129197) 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, 35564558 + 35564559.

It is an arithmetic number, because the mean of its divisors is an integer number (35564559).

Almost surely, 2^71129117 is an apocalyptic number.

It is an amenable number.

71129117 is a deficient number, since it is larger than the sum of its proper divisors (1).

71129117 is an equidigital number, since it uses as much as digits as its factorization.

71129117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882, while the sum is 29.

The square root of 71129117 is about 8433.8079774204. The cubic root of 71129117 is about 414.3326323116.

The spelling of 71129117 in words is "seventy-one million, one hundred twenty-nine thousand, one hundred seventeen".