63989743 has 2 divisors, whose sum is σ = 63989744. Its totient is φ = 63989742.

The previous prime is 63989693. The next prime is 63989767. The reversal of 63989743 is 34798936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63989743 - 2¹⁷ = 63858671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63989773) 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, 31994871 + 31994872.

It is an arithmetic number, because the mean of its divisors is an integer number (31994872).

Almost surely, 2^63989743 is an apocalyptic number.

63989743 is a deficient number, since it is larger than the sum of its proper divisors (1).

63989743 is an equidigital number, since it uses as much as digits as its factorization.

63989743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 49.

The square root of 63989743 is about 7999.3589118129. The cubic root of 63989743 is about 399.9786301083.

The spelling of 63989743 in words is "sixty-three million, nine hundred eighty-nine thousand, seven hundred forty-three".