71216659 has 4 divisors (see below), whose sum is σ = 71304016. Its totient is φ = 71129304.

The previous prime is 71216627. The next prime is 71216681. The reversal of 71216659 is 95661217.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71216659 - 2⁵ = 71216627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71216059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42444 + ... + 44089.

It is an arithmetic number, because the mean of its divisors is an integer number (17826004).

Almost surely, 2^71216659 is an apocalyptic number.

71216659 is a deficient number, since it is larger than the sum of its proper divisors (87357).

71216659 is an equidigital number, since it uses as much as digits as its factorization.

71216659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87356.

The product of its digits is 22680, while the sum is 37.

The square root of 71216659 is about 8438.9963265782. The cubic root of 71216659 is about 414.5025422755.

It can be divided in two parts, 712 and 16659, that added together give a palindrome (17371).

The spelling of 71216659 in words is "seventy-one million, two hundred sixteen thousand, six hundred fifty-nine".