71685489 has 8 divisors (see below), whose sum is σ = 96890272. Its totient is φ = 47135520.

The previous prime is 71685487. The next prime is 71685517. The reversal of 71685489 is 98458617.

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

It is not a de Polignac number, because 71685489 - 2¹ = 71685487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71685487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163447 + ... + 163884.

It is an arithmetic number, because the mean of its divisors is an integer number (12111284).

Almost surely, 2^71685489 is an apocalyptic number.

It is an amenable number.

71685489 is a deficient number, since it is larger than the sum of its proper divisors (25204783).

71685489 is a wasteful number, since it uses less digits than its factorization.

71685489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327407.

The product of its digits is 483840, while the sum is 48.

The square root of 71685489 is about 8466.7283527937. The cubic root of 71685489 is about 415.4101311513.

The spelling of 71685489 in words is "seventy-one million, six hundred eighty-five thousand, four hundred eighty-nine".