71385823 has 2 divisors, whose sum is σ = 71385824. Its totient is φ = 71385822.

The previous prime is 71385817. The next prime is 71385883. The reversal of 71385823 is 32858317.

It is a weak prime.

It is an emirp because it is prime and its reverse (32858317) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71385823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71385883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35692911 + 35692912.

It is an arithmetic number, because the mean of its divisors is an integer number (35692912).

Almost surely, 2^71385823 is an apocalyptic number.

71385823 is a deficient number, since it is larger than the sum of its proper divisors (1).

71385823 is an equidigital number, since it uses as much as digits as its factorization.

71385823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 71385823 is about 8449.0131376392. The cubic root of 71385823 is about 414.8304780112.

The spelling of 71385823 in words is "seventy-one million, three hundred eighty-five thousand, eight hundred twenty-three".