71965903 has 2 divisors, whose sum is σ = 71965904. Its totient is φ = 71965902.

The previous prime is 71965871. The next prime is 71965931. The reversal of 71965903 is 30956917.

It is a strong prime.

It is an emirp because it is prime and its reverse (30956917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71965903 - 2⁵ = 71965871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71945903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35982951 + 35982952.

It is an arithmetic number, because the mean of its divisors is an integer number (35982952).

Almost surely, 2^71965903 is an apocalyptic number.

71965903 is a deficient number, since it is larger than the sum of its proper divisors (1).

71965903 is an equidigital number, since it uses as much as digits as its factorization.

71965903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 71965903 is about 8483.2719513169. The cubic root of 71965903 is about 415.9510832984.

The spelling of 71965903 in words is "seventy-one million, nine hundred sixty-five thousand, nine hundred three".