71139611 has 8 divisors (see below), whose sum is σ = 75415824. Its totient is φ = 66873600.

The previous prime is 71139599. The next prime is 71139617. The reversal of 71139611 is 11693117.

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-71139611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71139617) 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, 15536 + ... + 19586.

It is an arithmetic number, because the mean of its divisors is an integer number (9426978).

Almost surely, 2^71139611 is an apocalyptic number.

71139611 is a deficient number, since it is larger than the sum of its proper divisors (4276213).

71139611 is a wasteful number, since it uses less digits than its factorization.

71139611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101.

The product of its digits is 1134, while the sum is 29.

The square root of 71139611 is about 8434.4300933732. The cubic root of 71139611 is about 414.3530074314.

The spelling of 71139611 in words is "seventy-one million, one hundred thirty-nine thousand, six hundred eleven".