71871099 has 16 divisors (see below), whose sum is σ = 97542144. Its totient is φ = 47062400.

The previous prime is 71871071. The next prime is 71871169. The reversal of 71871099 is 99017817.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 71871099 - 2¹⁵ = 71838331 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 71871099.

It is not an unprimeable number, because it can be changed into a prime (71871029) 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 15 ways as a sum of consecutive naturals, for example, 81139 + ... + 82019.

It is an arithmetic number, because the mean of its divisors is an integer number (6096384).

Almost surely, 2^71871099 is an apocalyptic number.

71871099 is a deficient number, since it is larger than the sum of its proper divisors (25671045).

71871099 is a wasteful number, since it uses less digits than its factorization.

71871099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338.

The product of its (nonzero) digits is 31752, while the sum is 42.

The square root of 71871099 is about 8477.6824073564. The cubic root of 71871099 is about 415.7683525257.

It can be divided in two parts, 718 and 71099, that added together give a palindrome (71817).

The spelling of 71871099 in words is "seventy-one million, eight hundred seventy-one thousand, ninety-nine".