80871823 has 2 divisors, whose sum is σ = 80871824. Its totient is φ = 80871822.

The previous prime is 80871793. The next prime is 80871827. The reversal of 80871823 is 32817808.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80871823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80871827) 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, 40435911 + 40435912.

It is an arithmetic number, because the mean of its divisors is an integer number (40435912).

Almost surely, 2^80871823 is an apocalyptic number.

80871823 is a deficient number, since it is larger than the sum of its proper divisors (1).

80871823 is an equidigital number, since it uses as much as digits as its factorization.

80871823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 80871823 is about 8992.8762362216. The cubic root of 80871823 is about 432.4465244007.

The spelling of 80871823 in words is "eighty million, eight hundred seventy-one thousand, eight hundred twenty-three".