9999959 has 4 divisors (see below), whose sum is σ = 10013304.
Its totient is φ = 9986616.
The previous prime is 9999943. The next prime is 9999971. The reversal of 9999959 is 9599999.
9999959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9599999 = 1019 ⋅9421.
It is a cyclic number.
It is not a de Polignac number, because 9999959 - 24 = 9999943 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 9999898 and 9999907.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (9999929) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5477 + ... + 7070.
It is an arithmetic number, because the mean of its divisors is an integer number (2503326).
Almost surely, 29999959 is an apocalyptic number.
9999959 is a deficient number, since it is larger than the sum of its proper divisors (13345).
9999959 is a wasteful number, since it uses less digits than its factorization.
9999959 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 13344.
The product of its digits is 2657205, while the sum is 59.
The square root of 9999959 is about 3162.2711774925.
The cubic root of 9999959 is about 215.4431745634.
The spelling of 9999959 in words is "nine million, nine hundred ninety-nine thousand, nine hundred fifty-nine".