71706217 has 4 divisors (see below), whose sum is σ = 78224976. Its totient is φ = 65187460.

The previous prime is 71706197. The next prime is 71706233. The reversal of 71706217 is 71260717.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71706217 - 2¹¹ = 71704169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71706277) 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 in 3 ways as a sum of consecutive naturals, for example, 3259363 + ... + 3259384.

It is an arithmetic number, because the mean of its divisors is an integer number (19556244).

Almost surely, 2^71706217 is an apocalyptic number.

It is an amenable number.

71706217 is a deficient number, since it is larger than the sum of its proper divisors (6518759).

71706217 is a wasteful number, since it uses less digits than its factorization.

71706217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6518758.

The product of its (nonzero) digits is 4116, while the sum is 31.

The square root of 71706217 is about 8467.9523498896. The cubic root of 71706217 is about 415.4501661780.

The spelling of 71706217 in words is "seventy-one million, seven hundred six thousand, two hundred seventeen".