71871169 has 2 divisors, whose sum is σ = 71871170. Its totient is φ = 71871168.

The previous prime is 71871071. The next prime is 71871179. The reversal of 71871169 is 96117817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46991025 + 24880144 = 6855^2 + 4988^2 .

It is a cyclic number.

It is not a de Polignac number, because 71871169 - 2⁹ = 71870657 is a prime.

It is a super-2 number, since 2×71871169² = 10330929866853122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71871179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35935584 + 35935585.

It is an arithmetic number, because the mean of its divisors is an integer number (35935585).

Almost surely, 2^71871169 is an apocalyptic number.

It is an amenable number.

71871169 is a deficient number, since it is larger than the sum of its proper divisors (1).

71871169 is an equidigital number, since it uses as much as digits as its factorization.

71871169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 40.

The square root of 71871169 is about 8477.6865358422. The cubic root of 71871169 is about 415.7684875071.

The spelling of 71871169 in words is "seventy-one million, eight hundred seventy-one thousand, one hundred sixty-nine".