71443729 has 8 divisors (see below), whose sum is σ = 82684160. Its totient is φ = 60461856.

The previous prime is 71443717. The next prime is 71443739. The reversal of 71443729 is 92734417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71443729 - 2¹¹ = 71441681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71443739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64044 + ... + 65149.

It is an arithmetic number, because the mean of its divisors is an integer number (10335520).

Almost surely, 2^71443729 is an apocalyptic number.

71443729 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

71443729 is a deficient number, since it is larger than the sum of its proper divisors (11240431).

71443729 is a wasteful number, since it uses less digits than its factorization.

71443729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129279.

The product of its digits is 42336, while the sum is 37.

The square root of 71443729 is about 8452.4392337360. The cubic root of 71443729 is about 414.9426136356.

The spelling of 71443729 in words is "seventy-one million, four hundred forty-three thousand, seven hundred twenty-nine".