71960639 has 2 divisors, whose sum is σ = 71960640. Its totient is φ = 71960638.

The previous prime is 71960633. The next prime is 71960719. The reversal of 71960639 is 93606917.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71960639 - 2¹² = 71956543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71960596 and 71960605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71960633) 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, 35980319 + 35980320.

It is an arithmetic number, because the mean of its divisors is an integer number (35980320).

Almost surely, 2^71960639 is an apocalyptic number.

71960639 is a deficient number, since it is larger than the sum of its proper divisors (1).

71960639 is an equidigital number, since it uses as much as digits as its factorization.

71960639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 71960639 is about 8482.9616879955. The cubic root of 71960639 is about 415.9409413663.

The spelling of 71960639 in words is "seventy-one million, nine hundred sixty thousand, six hundred thirty-nine".