71233139 has 8 divisors (see below), whose sum is σ = 74545920. Its totient is φ = 67938376.

The previous prime is 71233121. The next prime is 71233171. The reversal of 71233139 is 93133217.

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

It is a cyclic number.

It is not a de Polignac number, because 71233139 - 2²⁰ = 70184563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71233199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3944 + ... + 12570.

It is an arithmetic number, because the mean of its divisors is an integer number (9318240).

Almost surely, 2^71233139 is an apocalyptic number.

71233139 is a deficient number, since it is larger than the sum of its proper divisors (3312781).

71233139 is a wasteful number, since it uses less digits than its factorization.

71233139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9009.

The product of its digits is 3402, while the sum is 29.

The square root of 71233139 is about 8439.9726895293. The cubic root of 71233139 is about 414.5345126747.

The spelling of 71233139 in words is "seventy-one million, two hundred thirty-three thousand, one hundred thirty-nine".