71048139 has 4 divisors (see below), whose sum is σ = 94730856. Its totient is φ = 47365424.

The previous prime is 71048137. The next prime is 71048149. The reversal of 71048139 is 93184017.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71048139 - 2¹ = 71048137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71048137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11841354 + ... + 11841359.

It is an arithmetic number, because the mean of its divisors is an integer number (23682714).

Almost surely, 2^71048139 is an apocalyptic number.

71048139 is a deficient number, since it is larger than the sum of its proper divisors (23682717).

71048139 is a wasteful number, since it uses less digits than its factorization.

71048139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23682716.

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

The square root of 71048139 is about 8429.0058132617. The cubic root of 71048139 is about 414.1753382249.

The spelling of 71048139 in words is "seventy-one million, forty-eight thousand, one hundred thirty-nine".