9999963 has 16 divisors (see below), whose sum is σ = 15459840.
Its totient is φ = 6376392.
The previous prime is 9999943. The next prime is 9999971. The reversal of 9999963 is 3699999.
It can be divided in two parts, 999996 and 3, that added together give a palindrome (999999).
9999963 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is not a de Polignac number, because 9999963 - 25 = 9999931 is a prime.
9999963 is a lucky number.
It is a nialpdrome in base 10.
It is not an unprimeable number, because it can be changed into a prime (9999943) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7431 + ... + 8672.
It is an arithmetic number, because the mean of its divisors is an integer number (966240).
Almost surely, 29999963 is an apocalyptic number.
9999963 is a deficient number, since it is larger than the sum of its proper divisors (5459877).
9999963 is a wasteful number, since it uses less digits than its factorization.
9999963 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 16135 (or 16129 counting only the distinct ones).
The product of its digits is 1062882, while the sum is 54.
The square root of 9999963 is about 3162.2718099493.
The cubic root of 9999963 is about 215.4432032892.
The spelling of 9999963 in words is "nine million, nine hundred ninety-nine thousand, nine hundred sixty-three".