71671133 has 6 divisors (see below), whose sum is σ = 76135386. Its totient is φ = 67454912.

The previous prime is 71671123. The next prime is 71671141. The reversal of 71671133 is 33117617.

It can be written as a sum of positive squares in 3 ways, for example, as 17530969 + 54140164 = 4187^2 + 7358^2 .

It is not a de Polignac number, because 71671133 - 2⁸ = 71670877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71671096 and 71671105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71671123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123710 + ... + 124287.

It is an arithmetic number, because the mean of its divisors is an integer number (12689231).

Almost surely, 2^71671133 is an apocalyptic number.

It is an amenable number.

71671133 is a deficient number, since it is larger than the sum of its proper divisors (4464253).

71671133 is a wasteful number, since it uses less digits than its factorization.

71671133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248031 (or 248014 counting only the distinct ones).

The product of its digits is 2646, while the sum is 29.

The square root of 71671133 is about 8465.8805212453. The cubic root of 71671133 is about 415.3823987791.

The spelling of 71671133 in words is "seventy-one million, six hundred seventy-one thousand, one hundred thirty-three".