71213289 has 32 divisors (see below), whose sum is σ = 117596160. Its totient is φ = 37400832.

The previous prime is 71213281. The next prime is 71213321. The reversal of 71213289 is 98231217.

It is not a de Polignac number, because 71213289 - 2³ = 71213281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71213281) 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 31 ways as a sum of consecutive naturals, for example, 13032 + ... + 17670.

It is an arithmetic number, because the mean of its divisors is an integer number (3674880).

Almost surely, 2^71213289 is an apocalyptic number.

It is an amenable number.

71213289 is a deficient number, since it is larger than the sum of its proper divisors (46382871).

71213289 is a wasteful number, since it uses less digits than its factorization.

71213289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4709.

The product of its digits is 6048, while the sum is 33.

The square root of 71213289 is about 8438.7966559220. The cubic root of 71213289 is about 414.4960040319.

It can be divided in two parts, 712132 and 89, that added together give a triangular number (712221 = T₁₁₉₃).

The spelling of 71213289 in words is "seventy-one million, two hundred thirteen thousand, two hundred eighty-nine".