71057069 has 2 divisors, whose sum is σ = 71057070. Its totient is φ = 71057068.

The previous prime is 71057033. The next prime is 71057071. The reversal of 71057069 is 96075017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43072969 + 27984100 = 6563^2 + 5290^2 .

It is a cyclic number.

It is not a de Polignac number, because 71057069 - 2¹² = 71052973 is a prime.

It is a super-2 number, since 2×71057069² = 10098214109741522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 71057071, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71057099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35528534 + 35528535.

It is an arithmetic number, because the mean of its divisors is an integer number (35528535).

Almost surely, 2^71057069 is an apocalyptic number.

It is an amenable number.

71057069 is a deficient number, since it is larger than the sum of its proper divisors (1).

71057069 is an equidigital number, since it uses as much as digits as its factorization.

71057069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 71057069 is about 8429.5355150803. The cubic root of 71057069 is about 414.1926899852.

The spelling of 71057069 in words is "seventy-one million, fifty-seven thousand, sixty-nine".