71864017 has 2 divisors, whose sum is σ = 71864018. Its totient is φ = 71864016.

The previous prime is 71864003. The next prime is 71864033. The reversal of 71864017 is 71046817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49999041 + 21864976 = 7071^2 + 4676^2 .

It is a cyclic number.

It is not a de Polignac number, because 71864017 - 2⁷ = 71863889 is a prime.

It is not a weakly prime, because it can be changed into another prime (71864057) 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, 35932008 + 35932009.

It is an arithmetic number, because the mean of its divisors is an integer number (35932009).

Almost surely, 2^71864017 is an apocalyptic number.

It is an amenable number.

71864017 is a deficient number, since it is larger than the sum of its proper divisors (1).

71864017 is an equidigital number, since it uses as much as digits as its factorization.

71864017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 71864017 is about 8477.2647121580. The cubic root of 71864017 is about 415.7546958161.

The spelling of 71864017 in words is "seventy-one million, eight hundred sixty-four thousand, seventeen".