63516993 has 4 divisors (see below), whose sum is σ = 84689328. Its totient is φ = 42344660.

The previous prime is 63516991. The next prime is 63516997. The reversal of 63516993 is 39961536.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63516993 - 2¹ = 63516991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63516991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10586163 + ... + 10586168.

It is an arithmetic number, because the mean of its divisors is an integer number (21172332).

Almost surely, 2^63516993 is an apocalyptic number.

It is an amenable number.

63516993 is a deficient number, since it is larger than the sum of its proper divisors (21172335).

63516993 is a wasteful number, since it uses less digits than its factorization.

63516993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21172334.

The product of its digits is 131220, while the sum is 42.

The square root of 63516993 is about 7969.7548895810. The cubic root of 63516993 is about 398.9911933283.

The spelling of 63516993 in words is "sixty-three million, five hundred sixteen thousand, nine hundred ninety-three".