63993983 has 2 divisors, whose sum is σ = 63993984. Its totient is φ = 63993982.

The previous prime is 63993973. The next prime is 63993997. The reversal of 63993983 is 38939936.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63993983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63993953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31996991 + 31996992.

It is an arithmetic number, because the mean of its divisors is an integer number (31996992).

Almost surely, 2^63993983 is an apocalyptic number.

63993983 is a deficient number, since it is larger than the sum of its proper divisors (1).

63993983 is an equidigital number, since it uses as much as digits as its factorization.

63993983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784, while the sum is 50.

The square root of 63993983 is about 7999.6239286606. The cubic root of 63993983 is about 399.9874641905.

The spelling of 63993983 in words is "sixty-three million, nine hundred ninety-three thousand, nine hundred eighty-three".