71334881 has 2 divisors, whose sum is σ = 71334882. Its totient is φ = 71334880.

The previous prime is 71334869. The next prime is 71334889. The reversal of 71334881 is 18843317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61152400 + 10182481 = 7820^2 + 3191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71334881 is a prime.

It is a super-2 number, since 2×71334881² = 10177330494568322, which contains 22 as substring.

It is a Chen prime.

It is equal to p_4191875 and since 71334881 and 4191875 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (71334889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35667440 + 35667441.

It is an arithmetic number, because the mean of its divisors is an integer number (35667441).

Almost surely, 2^71334881 is an apocalyptic number.

It is an amenable number.

71334881 is a deficient number, since it is larger than the sum of its proper divisors (1).

71334881 is an equidigital number, since it uses as much as digits as its factorization.

71334881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 71334881 is about 8445.9979280130. The cubic root of 71334881 is about 414.7317781009.

Adding to 71334881 its sum of digits (35), we get a square (71334916 = 8446²).

The spelling of 71334881 in words is "seventy-one million, three hundred thirty-four thousand, eight hundred eighty-one".