71868517 has 8 divisors (see below), whose sum is σ = 82317312. Its totient is φ = 61465200.

The previous prime is 71868473. The next prime is 71868539. The reversal of 71868517 is 71586817.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71868517 - 2⁷ = 71868389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71860517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7909 + ... + 14362.

It is an arithmetic number, because the mean of its divisors is an integer number (10289664).

Almost surely, 2^71868517 is an apocalyptic number.

It is an amenable number.

71868517 is a deficient number, since it is larger than the sum of its proper divisors (10448795).

71868517 is a wasteful number, since it uses less digits than its factorization.

71868517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22739.

The product of its digits is 94080, while the sum is 43.

The square root of 71868517 is about 8477.5301238037. The cubic root of 71868517 is about 415.7633735807.

The spelling of 71868517 in words is "seventy-one million, eight hundred sixty-eight thousand, five hundred seventeen".