71059081 has 2 divisors, whose sum is σ = 71059082. Its totient is φ = 71059080.

The previous prime is 71059073. The next prime is 71059123. The reversal of 71059081 is 18095017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36060025 + 34999056 = 6005^2 + 5916^2 .

It is a cyclic number.

It is not a de Polignac number, because 71059081 - 2³ = 71059073 is a prime.

It is a super-2 number, since 2×71059081² = 10098785985129122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71059381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35529540 + 35529541.

It is an arithmetic number, because the mean of its divisors is an integer number (35529541).

Almost surely, 2^71059081 is an apocalyptic number.

It is an amenable number.

71059081 is a deficient number, since it is larger than the sum of its proper divisors (1).

71059081 is an equidigital number, since it uses as much as digits as its factorization.

71059081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 71059081 is about 8429.6548565170. The cubic root of 71059081 is about 414.1965992740.

The spelling of 71059081 in words is "seventy-one million, fifty-nine thousand, eighty-one".