71627161 has 4 divisors (see below), whose sum is σ = 71655732. Its totient is φ = 71598592.

The previous prime is 71627159. The next prime is 71627177. The reversal of 71627161 is 16172617.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7946761 + 63680400 = 2819^2 + 7980^2 .

It is a cyclic number.

It is not a de Polignac number, because 71627161 - 2¹ = 71627159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71627461) 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, 10120 + ... + 15673.

It is an arithmetic number, because the mean of its divisors is an integer number (17913933).

Almost surely, 2^71627161 is an apocalyptic number.

It is an amenable number.

71627161 is a deficient number, since it is larger than the sum of its proper divisors (28571).

71627161 is a wasteful number, since it uses less digits than its factorization.

71627161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28570.

The product of its digits is 3528, while the sum is 31.

The square root of 71627161 is about 8463.2831099993. The cubic root of 71627161 is about 415.2974322999.

Adding to 71627161 its reverse (16172617), we get a palindrome (87799778).

The spelling of 71627161 in words is "seventy-one million, six hundred twenty-seven thousand, one hundred sixty-one".