9955139 has 4 divisors (see below), whose sum is σ = 10118400. Its totient is φ = 9791880.

The previous prime is 9955093. The next prime is 9955157. The reversal of 9955139 is 9315599.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9955139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9955096 and 9955105.

It is not an unprimeable number, because it can be changed into a prime (9955189) 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, 81539 + ... + 81660.

It is an arithmetic number, because the mean of its divisors is an integer number (2529600).

Almost surely, 2^9955139 is an apocalyptic number.

9955139 is a deficient number, since it is larger than the sum of its proper divisors (163261).

9955139 is a wasteful number, since it uses less digits than its factorization.

9955139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163260.

The product of its digits is 54675, while the sum is 41.

The square root of 9955139 is about 3155.1765402272. The cubic root of 9955139 is about 215.1208190590.

The spelling of 9955139 in words is "nine million, nine hundred fifty-five thousand, one hundred thirty-nine".