71618317 has 4 divisors (see below), whose sum is σ = 72969660. Its totient is φ = 70266976.

The previous prime is 71618311. The next prime is 71618321. The reversal of 71618317 is 71381617.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54922921 + 16695396 = 7411^2 + 4086^2 .

It is not a de Polignac number, because 71618317 - 2¹¹ = 71616269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71618311) 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, 675592 + ... + 675697.

It is an arithmetic number, because the mean of its divisors is an integer number (18242415).

Almost surely, 2^71618317 is an apocalyptic number.

It is an amenable number.

71618317 is a deficient number, since it is larger than the sum of its proper divisors (1351343).

71618317 is a wasteful number, since it uses less digits than its factorization.

71618317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351342.

The product of its digits is 7056, while the sum is 34.

The square root of 71618317 is about 8462.7606016004. The cubic root of 71618317 is about 415.2803389626.

The spelling of 71618317 in words is "seventy-one million, six hundred eighteen thousand, three hundred seventeen".