71057087 has 2 divisors, whose sum is σ = 71057088. Its totient is φ = 71057086.

The previous prime is 71057083. The next prime is 71057099. The reversal of 71057087 is 78075017.

It is a weak prime.

It is an emirp because it is prime and its reverse (78075017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71057087 - 2² = 71057083 is a prime.

It is a super-2 number, since 2×71057087² = 10098219225851138, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71057081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35528543 + 35528544.

It is an arithmetic number, because the mean of its divisors is an integer number (35528544).

Almost surely, 2^71057087 is an apocalyptic number.

71057087 is a deficient number, since it is larger than the sum of its proper divisors (1).

71057087 is an equidigital number, since it uses as much as digits as its factorization.

71057087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13720, while the sum is 35.

The square root of 71057087 is about 8429.5365827547. The cubic root of 71057087 is about 414.1927249593.

The spelling of 71057087 in words is "seventy-one million, fifty-seven thousand, eighty-seven".