71113123 has 4 divisors (see below), whose sum is σ = 71130600. Its totient is φ = 71095648.

The previous prime is 71113111. The next prime is 71113183. The reversal of 71113123 is 32131117.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71113123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71113123.

It is not an unprimeable number, because it can be changed into a prime (71113183) 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 3 ways as a sum of consecutive naturals, for example, 936 + ... + 11962.

It is an arithmetic number, because the mean of its divisors is an integer number (17782650).

Almost surely, 2^71113123 is an apocalyptic number.

71113123 is a deficient number, since it is larger than the sum of its proper divisors (17477).

71113123 is a wasteful number, since it uses less digits than its factorization.

71113123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17476.

The product of its digits is 126, while the sum is 19.

The square root of 71113123 is about 8432.8597166086. The cubic root of 71113123 is about 414.3015745528.

The spelling of 71113123 in words is "seventy-one million, one hundred thirteen thousand, one hundred twenty-three".