9955199 has 2 divisors, whose sum is σ = 9955200. Its totient is φ = 9955198.

The previous prime is 9955189. The next prime is 9955201. The reversal of 9955199 is 9915599.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9955199 is a prime.

It is a Sophie Germain prime.

Together with 9955201, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9955189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4977599 + 4977600.

It is an arithmetic number, because the mean of its divisors is an integer number (4977600).

Almost surely, 2^9955199 is an apocalyptic number.

9955199 is a deficient number, since it is larger than the sum of its proper divisors (1).

9955199 is an equidigital number, since it uses as much as digits as its factorization.

9955199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164025, while the sum is 47.

The square root of 9955199 is about 3155.1860483971. The cubic root of 9955199 is about 215.1212512386.

It can be divided in two parts, 9955 and 199, that multiplied together give a triangular number (1981045 = T₁₉₉₀).

The spelling of 9955199 in words is "nine million, nine hundred fifty-five thousand, one hundred ninety-nine".