71687996 has 24 divisors (see below), whose sum is σ = 129849216. Its totient is φ = 34594560.

The previous prime is 71687983. The next prime is 71688041. The reversal of 71687996 is 69978617.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76040 + ... + 76976.

It is an arithmetic number, because the mean of its divisors is an integer number (5410384).

Almost surely, 2^71687996 is an apocalyptic number.

It is an amenable number.

71687996 is a deficient number, since it is larger than the sum of its proper divisors (58161220).

71687996 is a wasteful number, since it uses less digits than its factorization.

71687996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589 (or 1587 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 53.

The square root of 71687996 is about 8466.8764016017. The cubic root of 71687996 is about 415.4149736983.

The spelling of 71687996 in words is "seventy-one million, six hundred eighty-seven thousand, nine hundred ninety-six".