9009909181 has 8 divisors (see below), whose sum is σ = 11089119104. Its totient is φ = 7128719280.

The previous prime is 9009909179. The next prime is 9009909199. The reversal of 9009909181 is 1819099009.

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 9009909181 - 2¹ = 9009909179 is a prime.

It is a super-2 number, since 2×9009909181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9009909151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49504905 + ... + 49505086.

It is an arithmetic number, because the mean of its divisors is an integer number (1386139888).

Almost surely, 2^9009909181 is an apocalyptic number.

9009909181 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9009909181 is a deficient number, since it is larger than the sum of its proper divisors (2079209923).

9009909181 is a wasteful number, since it uses less digits than its factorization.

9009909181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99010011.

The product of its (nonzero) digits is 52488, while the sum is 46.

The square root of 9009909181 is about 94920.5414070105. The cubic root of 9009909181 is about 2080.8469477558.

The spelling of 9009909181 in words is "nine billion, nine million, nine hundred nine thousand, one hundred eighty-one".