71712017 has 8 divisors (see below), whose sum is σ = 78097320. Its totient is φ = 65450880.

The previous prime is 71711951. The next prime is 71712049. The reversal of 71712017 is 71021717.

It can be written as a sum of positive squares in 4 ways, for example, as 410881 + 71301136 = 641^2 + 8444^2 .

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 71712017 - 2¹⁰ = 71710993 is a prime.

It is a super-2 number, since 2×71712017² = 10285226764416578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71712077) 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 7 ways as a sum of consecutive naturals, for example, 29834 + ... + 32147.

It is an arithmetic number, because the mean of its divisors is an integer number (9762165).

Almost surely, 2^71712017 is an apocalyptic number.

It is an amenable number.

71712017 is a deficient number, since it is larger than the sum of its proper divisors (6385303).

71712017 is a wasteful number, since it uses less digits than its factorization.

71712017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62083.

The product of its (nonzero) digits is 686, while the sum is 26.

The square root of 71712017 is about 8468.2948106452. The cubic root of 71712017 is about 415.4613671873.

The spelling of 71712017 in words is "seventy-one million, seven hundred twelve thousand, seventeen".