71863241 has 2 divisors, whose sum is σ = 71863242. Its totient is φ = 71863240.

The previous prime is 71863193. The next prime is 71863243. The reversal of 71863241 is 14236817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64464841 + 7398400 = 8029^2 + 2720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71863241 is a prime.

Together with 71863243, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 71863198 and 71863207.

It is not a weakly prime, because it can be changed into another prime (71863243) 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, 35931620 + 35931621.

It is an arithmetic number, because the mean of its divisors is an integer number (35931621).

Almost surely, 2^71863241 is an apocalyptic number.

It is an amenable number.

71863241 is a deficient number, since it is larger than the sum of its proper divisors (1).

71863241 is an equidigital number, since it uses as much as digits as its factorization.

71863241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 71863241 is about 8477.2189425542. The cubic root of 71863241 is about 415.7531993471.

The spelling of 71863241 in words is "seventy-one million, eight hundred sixty-three thousand, two hundred forty-one".