71150989 has 12 divisors (see below), whose sum is σ = 89135004. Its totient is φ = 56294784.

The previous prime is 71150971. The next prime is 71150999. The reversal of 71150989 is 98905117.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10778089 + 60372900 = 3283^2 + 7770^2 .

It is not a de Polignac number, because 71150989 - 2⁵ = 71150957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71150969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55212 + ... + 56485.

It is an arithmetic number, because the mean of its divisors is an integer number (7427917).

Almost surely, 2^71150989 is an apocalyptic number.

It is an amenable number.

71150989 is a deficient number, since it is larger than the sum of its proper divisors (17984015).

71150989 is a wasteful number, since it uses less digits than its factorization.

71150989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111724 (or 111717 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 71150989 is about 8435.1045636672. The cubic root of 71150989 is about 414.3750966591.

The spelling of 71150989 in words is "seventy-one million, one hundred fifty thousand, nine hundred eighty-nine".