71243723 has 4 divisors (see below), whose sum is σ = 71557800. Its totient is φ = 70929648.

The previous prime is 71243677. The next prime is 71243737. The reversal of 71243723 is 32734217.

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

It is a cyclic number.

It is not a de Polignac number, because 71243723 - 2⁶ = 71243659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71243423) 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, 156698 + ... + 157151.

It is an arithmetic number, because the mean of its divisors is an integer number (17889450).

Almost surely, 2^71243723 is an apocalyptic number.

71243723 is a deficient number, since it is larger than the sum of its proper divisors (314077).

71243723 is a wasteful number, since it uses less digits than its factorization.

71243723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314076.

The product of its digits is 7056, while the sum is 29.

The square root of 71243723 is about 8440.5996824870. The cubic root of 71243723 is about 414.5550425201. Note that the first 3 decimals are identical.

The spelling of 71243723 in words is "seventy-one million, two hundred forty-three thousand, seven hundred twenty-three".