71123389 has 4 divisors (see below), whose sum is σ = 72097756. Its totient is φ = 70149024.

The previous prime is 71123387. The next prime is 71123431. The reversal of 71123389 is 98332117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98332117 = 13 ⋅7564009.

It can be written as a sum of positive squares in 2 ways, for example, as 51008164 + 20115225 = 7142^2 + 4485^2 .

It is a cyclic number.

It is not a de Polignac number, because 71123389 - 2¹ = 71123387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71123387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487074 + ... + 487219.

It is an arithmetic number, because the mean of its divisors is an integer number (18024439).

Almost surely, 2^71123389 is an apocalyptic number.

It is an amenable number.

71123389 is a deficient number, since it is larger than the sum of its proper divisors (974367).

71123389 is an equidigital number, since it uses as much as digits as its factorization.

71123389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974366.

The product of its digits is 9072, while the sum is 34.

The square root of 71123389 is about 8433.4683849529. The cubic root of 71123389 is about 414.3215099980.

It can be divided in two parts, 7112 and 3389, that added together give a palindrome (10501).

The spelling of 71123389 in words is "seventy-one million, one hundred twenty-three thousand, three hundred eighty-nine".