71118891 has 10 divisors (see below), whose sum is σ = 106239452. Its totient is φ = 47412540.

The previous prime is 71118889. The next prime is 71118899. The reversal of 71118891 is 19881117.

It is a happy number.

It is not a de Polignac number, because 71118891 - 2¹ = 71118889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71118899) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 438925 + ... + 439086.

Almost surely, 2^71118891 is an apocalyptic number.

71118891 is a deficient number, since it is larger than the sum of its proper divisors (35120561).

71118891 is an equidigital number, since it uses as much as digits as its factorization.

71118891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878023 (or 878014 counting only the distinct ones).

The product of its digits is 4032, while the sum is 36.

The square root of 71118891 is about 8433.2017051651. The cubic root of 71118891 is about 414.3127756118.

The spelling of 71118891 in words is "seventy-one million, one hundred eighteen thousand, eight hundred ninety-one".