86499823 has 2 divisors, whose sum is σ = 86499824. Its totient is φ = 86499822.

The previous prime is 86499811. The next prime is 86499851. The reversal of 86499823 is 32899468.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86499823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86499863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43249911 + 43249912.

It is an arithmetic number, because the mean of its divisors is an integer number (43249912).

Almost surely, 2^86499823 is an apocalyptic number.

86499823 is a deficient number, since it is larger than the sum of its proper divisors (1).

86499823 is an equidigital number, since it uses as much as digits as its factorization.

86499823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 49.

The square root of 86499823 is about 9300.5281032853. The cubic root of 86499823 is about 442.2539694382.

The spelling of 86499823 in words is "eighty-six million, four hundred ninety-nine thousand, eight hundred twenty-three".