71986723 has 2 divisors, whose sum is σ = 71986724. Its totient is φ = 71986722.

The previous prime is 71986703. The next prime is 71986741. The reversal of 71986723 is 32768917.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71986723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71986723.

It is not a weakly prime, because it can be changed into another prime (71986703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35993361 + 35993362.

It is an arithmetic number, because the mean of its divisors is an integer number (35993362).

Almost surely, 2^71986723 is an apocalyptic number.

71986723 is a deficient number, since it is larger than the sum of its proper divisors (1).

71986723 is an equidigital number, since it uses as much as digits as its factorization.

71986723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 71986723 is about 8484.4989834403. The cubic root of 71986723 is about 415.9911914894.

The spelling of 71986723 in words is "seventy-one million, nine hundred eighty-six thousand, seven hundred twenty-three".