9959959 has 4 divisors (see below), whose sum is σ = 10281280. Its totient is φ = 9638640.

The previous prime is 9959947. The next prime is 9959981. The reversal of 9959959 is 9599599.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9599599 = 569 ⋅16871.

It is a cyclic number.

It is not a de Polignac number, because 9959959 - 2⁵ = 9959927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9959659) 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, 160614 + ... + 160675.

It is an arithmetic number, because the mean of its divisors is an integer number (2570320).

Almost surely, 2^9959959 is an apocalyptic number.

9959959 is a deficient number, since it is larger than the sum of its proper divisors (321321).

9959959 is a wasteful number, since it uses less digits than its factorization.

9959959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321320.

The product of its digits is 1476225, while the sum is 55.

The square root of 9959959 is about 3155.9402719316. The cubic root of 9959959 is about 215.1555319529.

Multiplying 9959959 by its sum of digits (55), we get a palindrome (547797745).

It can be divided in two parts, 995995 and 9, that added together give a square (996004 = 998²).

The spelling of 9959959 in words is "nine million, nine hundred fifty-nine thousand, nine hundred fifty-nine".