63867823 has 2 divisors, whose sum is σ = 63867824. Its totient is φ = 63867822.

The previous prime is 63867799. The next prime is 63867833. The reversal of 63867823 is 32876836.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63867823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63867823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63867833) 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, 31933911 + 31933912.

It is an arithmetic number, because the mean of its divisors is an integer number (31933912).

Almost surely, 2^63867823 is an apocalyptic number.

63867823 is a deficient number, since it is larger than the sum of its proper divisors (1).

63867823 is an equidigital number, since it uses as much as digits as its factorization.

63867823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 43.

The square root of 63867823 is about 7991.7346677677. The cubic root of 63867823 is about 399.7244414623.

The spelling of 63867823 in words is "sixty-three million, eight hundred sixty-seven thousand, eight hundred twenty-three".