71989827 has 32 divisors (see below), whose sum is σ = 121347072. Its totient is φ = 36941184.

The previous prime is 71989789. The next prime is 71989831. The reversal of 71989827 is 72898917.

It is not a de Polignac number, because 71989827 - 2⁶ = 71989763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71989827.

It is not an unprimeable number, because it can be changed into a prime (71989837) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6538 + ... + 13664.

It is an arithmetic number, because the mean of its divisors is an integer number (3792096).

Almost surely, 2^71989827 is an apocalyptic number.

71989827 is a deficient number, since it is larger than the sum of its proper divisors (49357245).

71989827 is a wasteful number, since it uses less digits than its factorization.

71989827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7187.

The product of its digits is 508032, while the sum is 51.

The square root of 71989827 is about 8484.6819032890. The cubic root of 71989827 is about 415.9971704535.

The spelling of 71989827 in words is "seventy-one million, nine hundred eighty-nine thousand, eight hundred twenty-seven".