71932681 has 2 divisors, whose sum is σ = 71932682. Its totient is φ = 71932680.

The previous prime is 71932633. The next prime is 71932691. The reversal of 71932681 is 18623917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71318025 + 614656 = 8445^2 + 784^2 .

It is a cyclic number.

It is not a de Polignac number, because 71932681 - 2⁹ = 71932169 is a prime.

It is a super-2 number, since 2×71932681² = 10348621191695522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71932681.

It is not a weakly prime, because it can be changed into another prime (71932621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35966340 + 35966341.

It is an arithmetic number, because the mean of its divisors is an integer number (35966341).

Almost surely, 2^71932681 is an apocalyptic number.

It is an amenable number.

71932681 is a deficient number, since it is larger than the sum of its proper divisors (1).

71932681 is an equidigital number, since it uses as much as digits as its factorization.

71932681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 37.

The square root of 71932681 is about 8481.3136364599. The cubic root of 71932681 is about 415.8870675480.

The spelling of 71932681 in words is "seventy-one million, nine hundred thirty-two thousand, six hundred eighty-one".