71139133 has 8 divisors (see below), whose sum is σ = 76906368. Its totient is φ = 65414064.

The previous prime is 71139127. The next prime is 71139137. The reversal of 71139133 is 33193117.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71139133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71139137) 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, 6985 + ... + 13822.

It is an arithmetic number, because the mean of its divisors is an integer number (9613296).

Almost surely, 2^71139133 is an apocalyptic number.

It is an amenable number.

71139133 is a deficient number, since it is larger than the sum of its proper divisors (5767235).

71139133 is a wasteful number, since it uses less digits than its factorization.

71139133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21083.

The product of its digits is 1701, while the sum is 28.

The square root of 71139133 is about 8434.4017570898. The cubic root of 71139133 is about 414.3520793915.

The spelling of 71139133 in words is "seventy-one million, one hundred thirty-nine thousand, one hundred thirty-three".