71982287 has 8 divisors (see below), whose sum is σ = 77597520. Its totient is φ = 66378240.

The previous prime is 71982283. The next prime is 71982293. The reversal of 71982287 is 78228917.

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 71982287 - 2² = 71982283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71982283) 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, 14639 + ... + 18927.

It is an arithmetic number, because the mean of its divisors is an integer number (9699690).

Almost surely, 2^71982287 is an apocalyptic number.

71982287 is a deficient number, since it is larger than the sum of its proper divisors (5615233).

71982287 is a wasteful number, since it uses less digits than its factorization.

71982287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5593.

The product of its digits is 112896, while the sum is 44.

The square root of 71982287 is about 8484.2375615019. The cubic root of 71982287 is about 415.9826465117.

The spelling of 71982287 in words is "seventy-one million, nine hundred eighty-two thousand, two hundred eighty-seven".