63323891 has 2 divisors, whose sum is σ = 63323892. Its totient is φ = 63323890.

The previous prime is 63323867. The next prime is 63323893. The reversal of 63323891 is 19832336.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63323891 is a prime.

Together with 63323893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63323893) 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, 31661945 + 31661946.

It is an arithmetic number, because the mean of its divisors is an integer number (31661946).

Almost surely, 2^63323891 is an apocalyptic number.

63323891 is a deficient number, since it is larger than the sum of its proper divisors (1).

63323891 is an equidigital number, since it uses as much as digits as its factorization.

63323891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 63323891 is about 7957.6309916960. The cubic root of 63323891 is about 398.5864501597.

The spelling of 63323891 in words is "sixty-three million, three hundred twenty-three thousand, eight hundred ninety-one".