71235823 has 2 divisors, whose sum is σ = 71235824. Its totient is φ = 71235822.

The previous prime is 71235817. The next prime is 71235839. The reversal of 71235823 is 32853217.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71235823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71235893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35617911 + 35617912.

It is an arithmetic number, because the mean of its divisors is an integer number (35617912).

Almost surely, 2^71235823 is an apocalyptic number.

71235823 is a deficient number, since it is larger than the sum of its proper divisors (1).

71235823 is an equidigital number, since it uses as much as digits as its factorization.

71235823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 71235823 is about 8440.1316932854. The cubic root of 71235823 is about 414.5397190373.

The spelling of 71235823 in words is "seventy-one million, two hundred thirty-five thousand, eight hundred twenty-three".