71712289 has 12 divisors (see below), whose sum is σ = 82570320. Its totient is φ = 61758360.

The previous prime is 71712259. The next prime is 71712293. The reversal of 71712289 is 98221717.

It is not a de Polignac number, because 71712289 - 2⁵ = 71712257 is a prime.

It is a super-3 number, since 3×71712289³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71712209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5059 + ... + 13000.

It is an arithmetic number, because the mean of its divisors is an integer number (6880860).

Almost surely, 2^71712289 is an apocalyptic number.

It is an amenable number.

71712289 is a deficient number, since it is larger than the sum of its proper divisors (10858031).

71712289 is a wasteful number, since it uses less digits than its factorization.

71712289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18108 (or 18089 counting only the distinct ones).

The product of its digits is 14112, while the sum is 37.

The square root of 71712289 is about 8468.3108705337. The cubic root of 71712289 is about 415.4618924612.

The spelling of 71712289 in words is "seventy-one million, seven hundred twelve thousand, two hundred eighty-nine".