71985733 has 2 divisors, whose sum is σ = 71985734. Its totient is φ = 71985732.

The previous prime is 71985707. The next prime is 71985761. The reversal of 71985733 is 33758917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58721569 + 13264164 = 7663^2 + 3642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71985733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71985733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71985703) 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, 35992866 + 35992867.

It is an arithmetic number, because the mean of its divisors is an integer number (35992867).

Almost surely, 2^71985733 is an apocalyptic number.

It is an amenable number.

71985733 is a deficient number, since it is larger than the sum of its proper divisors (1).

71985733 is an equidigital number, since it uses as much as digits as its factorization.

71985733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 43.

The square root of 71985733 is about 8484.4406415509. The cubic root of 71985733 is about 415.9892845027.

The spelling of 71985733 in words is "seventy-one million, nine hundred eighty-five thousand, seven hundred thirty-three".