71684893 has 6 divisors (see below), whose sum is σ = 83388606. Its totient is φ = 61444152.

The previous prime is 71684881. The next prime is 71684923. The reversal of 71684893 is 39848617.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 67535524 + 4149369 = 8218^2 + 2037^2 .

It is not a de Polignac number, because 71684893 - 2⁵ = 71684861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71684293) 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 5 ways as a sum of consecutive naturals, for example, 731430 + ... + 731527.

It is an arithmetic number, because the mean of its divisors is an integer number (13898101).

Almost surely, 2^71684893 is an apocalyptic number.

It is an amenable number.

71684893 is a deficient number, since it is larger than the sum of its proper divisors (11703713).

71684893 is a wasteful number, since it uses less digits than its factorization.

71684893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462971 (or 1462964 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 71684893 is about 8466.6931561265. The cubic root of 71684893 is about 415.4089798949.

The spelling of 71684893 in words is "seventy-one million, six hundred eighty-four thousand, eight hundred ninety-three".