71270173 has 6 divisors (see below), whose sum is σ = 77174394. Its totient is φ = 65787696.

The previous prime is 71270167. The next prime is 71270179. The reversal of 71270173 is 37107217.

It is the 3447-th star number.

It is an interprime number because it is at equal distance from previous prime (71270167) and next prime (71270179).

It can be written as a sum of positive squares in 3 ways, for example, as 2809 + 71267364 = 53^2 + 8442^2 .

It is not a de Polignac number, because 71270173 - 2⁵ = 71270141 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 (71270179) 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, 210690 + ... + 211027.

It is an arithmetic number, because the mean of its divisors is an integer number (12862399).

Almost surely, 2^71270173 is an apocalyptic number.

It is an amenable number.

71270173 is a deficient number, since it is larger than the sum of its proper divisors (5904221).

71270173 is a wasteful number, since it uses less digits than its factorization.

71270173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421743 (or 421730 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 71270173 is about 8442.1663688890. The cubic root of 71270173 is about 414.6063388484.

The spelling of 71270173 in words is "seventy-one million, two hundred seventy thousand, one hundred seventy-three".