71940017 has 2 divisors, whose sum is σ = 71940018. Its totient is φ = 71940016.

The previous prime is 71940013. The next prime is 71940019. The reversal of 71940017 is 71004917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35988001 + 35952016 = 5999^2 + 5996^2 .

It is a cyclic number.

It is not a de Polignac number, because 71940017 - 2² = 71940013 is a prime.

Together with 71940019, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4225376 and since 71940017 and 4225376 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 (71940013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35970008 + 35970009.

It is an arithmetic number, because the mean of its divisors is an integer number (35970009).

Almost surely, 2^71940017 is an apocalyptic number.

It is an amenable number.

71940017 is a deficient number, since it is larger than the sum of its proper divisors (1).

71940017 is an equidigital number, since it uses as much as digits as its factorization.

71940017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 71940017 is about 8481.7461056082. The cubic root of 71940017 is about 415.9012050433.

The spelling of 71940017 in words is "seventy-one million, nine hundred forty thousand, seventeen".