63947423 has 2 divisors, whose sum is σ = 63947424. Its totient is φ = 63947422.

The previous prime is 63947417. The next prime is 63947441. The reversal of 63947423 is 32474936.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63947423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63947453) 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, 31973711 + 31973712.

It is an arithmetic number, because the mean of its divisors is an integer number (31973712).

Almost surely, 2^63947423 is an apocalyptic number.

63947423 is a deficient number, since it is larger than the sum of its proper divisors (1).

63947423 is an equidigital number, since it uses as much as digits as its factorization.

63947423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 38.

The square root of 63947423 is about 7996.7132623347. The cubic root of 63947423 is about 399.8904345746.

The spelling of 63947423 in words is "sixty-three million, nine hundred forty-seven thousand, four hundred twenty-three".