9999155 has 8 divisors (see below), whose sum is σ = 12016512. Its totient is φ = 7987648.

The previous prime is 9999083. The next prime is 9999161. The reversal of 9999155 is 5519999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9999155 - 2¹⁶ = 9933619 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4574 + ... + 6396.

It is an arithmetic number, because the mean of its divisors is an integer number (1502064).

Almost surely, 2^9999155 is an apocalyptic number.

9999155 is a deficient number, since it is larger than the sum of its proper divisors (2017357).

9999155 is a wasteful number, since it uses less digits than its factorization.

9999155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925.

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

The square root of 9999155 is about 3162.1440511147. The cubic root of 9999155 is about 215.4374005079.

The spelling of 9999155 in words is "nine million, nine hundred ninety-nine thousand, one hundred fifty-five".