71512169 has 2 divisors, whose sum is σ = 71512170. Its totient is φ = 71512168.

The previous prime is 71512153. The next prime is 71512201. The reversal of 71512169 is 96121517.

It is an a-pointer prime, because the next prime (71512201) can be obtained adding 71512169 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42406144 + 29106025 = 6512^2 + 5395^2 .

It is a cyclic number.

It is not a de Polignac number, because 71512169 - 2⁴ = 71512153 is a prime.

It is a super-2 number, since 2×71512169² = 10227980630169122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (71512369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35756084 + 35756085.

It is an arithmetic number, because the mean of its divisors is an integer number (35756085).

Almost surely, 2^71512169 is an apocalyptic number.

It is an amenable number.

71512169 is a deficient number, since it is larger than the sum of its proper divisors (1).

71512169 is an equidigital number, since it uses as much as digits as its factorization.

71512169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 32.

The square root of 71512169 is about 8456.4868000843. The cubic root of 71512169 is about 415.0750703698.

The spelling of 71512169 in words is "seventy-one million, five hundred twelve thousand, one hundred sixty-nine".