9999099001 has 4 divisors (see below), whose sum is σ = 10077832192. Its totient is φ = 9920365812.

The previous prime is 9999098971. The next prime is 9999099017. The reversal of 9999099001 is 1009909999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9999099001 - 2¹³ = 9999090809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9999099701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39366405 + ... + 39366658.

It is an arithmetic number, because the mean of its divisors is an integer number (2519458048).

Almost surely, 2^9999099001 is an apocalyptic number.

It is an amenable number.

9999099001 is a deficient number, since it is larger than the sum of its proper divisors (78733191).

9999099001 is a wasteful number, since it uses less digits than its factorization.

9999099001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78733190.

The product of its (nonzero) digits is 531441, while the sum is 55.

The square root of 9999099001 is about 99995.4949035205. The cubic root of 9999099001 is about 2154.3699833051.

It can be divided in two parts, 999909 and 9001, that added together give a triangular number (1008910 = T₁₄₂₀).

The spelling of 9999099001 in words is "nine billion, nine hundred ninety-nine million, ninety-nine thousand, one".