71090889 has 8 divisors (see below), whose sum is σ = 100363680. Its totient is φ = 44606016.

The previous prime is 71090881. The next prime is 71090891. The reversal of 71090889 is 98809017.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71090889 - 2³ = 71090881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71090889.

It is not an unprimeable number, because it can be changed into a prime (71090881) 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, 696919 + ... + 697020.

It is an arithmetic number, because the mean of its divisors is an integer number (12545460).

Almost surely, 2^71090889 is an apocalyptic number.

It is an amenable number.

71090889 is a deficient number, since it is larger than the sum of its proper divisors (29272791).

71090889 is a wasteful number, since it uses less digits than its factorization.

71090889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393959.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 71090889 is about 8431.5413181695. The cubic root of 71090889 is about 414.2583919867.

The spelling of 71090889 in words is "seventy-one million, ninety thousand, eight hundred eighty-nine".