9999355 has 4 divisors (see below), whose sum is σ = 11999232. Its totient is φ = 7999480.

The previous prime is 9999347. The next prime is 9999397. The reversal of 9999355 is 5539999.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 9999355 - 2³ = 9999347 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9999299 and 9999308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999931 + ... + 999940.

It is an arithmetic number, because the mean of its divisors is an integer number (2999808).

Almost surely, 2^9999355 is an apocalyptic number.

9999355 is a deficient number, since it is larger than the sum of its proper divisors (1999877).

9999355 is a wasteful number, since it uses less digits than its factorization.

9999355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999876.

The product of its digits is 492075, while the sum is 49.

The square root of 9999355 is about 3162.1756750693. The cubic root of 9999355 is about 215.4388368690.

The spelling of 9999355 in words is "nine million, nine hundred ninety-nine thousand, three hundred fifty-five".