71443723 has 16 divisors (see below), whose sum is σ = 78453760. Its totient is φ = 64665216.

The previous prime is 71443717. The next prime is 71443739. The reversal of 71443723 is 32734417.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71443723 is a prime.

It is a super-2 number, since 2×71443723² = 10208411112201458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71443763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179761 + ... + 180157.

It is an arithmetic number, because the mean of its divisors is an integer number (4903360).

Almost surely, 2^71443723 is an apocalyptic number.

71443723 is a deficient number, since it is larger than the sum of its proper divisors (7010037).

71443723 is a wasteful number, since it uses less digits than its factorization.

71443723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646.

The product of its digits is 14112, while the sum is 31.

The square root of 71443723 is about 8452.4388788089. The cubic root of 71443723 is about 414.9426020196.

The spelling of 71443723 in words is "seventy-one million, four hundred forty-three thousand, seven hundred twenty-three".