990001111 has 8 divisors (see below), whose sum is σ = 1089910800. Its totient is φ = 891743040.

The previous prime is 990001097. The next prime is 990001127. The reversal of 990001111 is 111100099.

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 990001111 - 2¹⁷ = 989870039 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990005111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411646 + ... + 414043.

It is an arithmetic number, because the mean of its divisors is an integer number (136238850).

Almost surely, 2^990001111 is an apocalyptic number.

990001111 is a deficient number, since it is larger than the sum of its proper divisors (99909689).

990001111 is a wasteful number, since it uses less digits than its factorization.

990001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825809.

The product of its (nonzero) digits is 81, while the sum is 22.

The square root of 990001111 is about 31464.2831000485. The cubic root of 990001111 is about 996.6558662354.

The spelling of 990001111 in words is "nine hundred ninety million, one thousand, one hundred eleven".