70217071 has 2 divisors, whose sum is σ = 70217072. Its totient is φ = 70217070.

The previous prime is 70217053. The next prime is 70217093. The reversal of 70217071 is 17071207.

It is a weak prime.

It is an emirp because it is prime and its reverse (17071207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70217071 - 2⁷ = 70216943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70217011) 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, 35108535 + 35108536.

It is an arithmetic number, because the mean of its divisors is an integer number (35108536).

Almost surely, 2^70217071 is an apocalyptic number.

70217071 is a deficient number, since it is larger than the sum of its proper divisors (1).

70217071 is an equidigital number, since it uses as much as digits as its factorization.

70217071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 686, while the sum is 25.

The square root of 70217071 is about 8379.5626974204. The cubic root of 70217071 is about 412.5540958746.

Adding to 70217071 its reverse (17071207), we get a palindrome (87288278).

The spelling of 70217071 in words is "seventy million, two hundred seventeen thousand, seventy-one".