990111407 has 8 divisors (see below), whose sum is σ = 997855200. Its totient is φ = 982382560.

The previous prime is 990111403. The next prime is 990111439. The reversal of 990111407 is 704111099.

It is a happy number.

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 990111407 - 2² = 990111403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990111403) 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, 154958 + ... + 161220.

It is an arithmetic number, because the mean of its divisors is an integer number (124731900).

Almost surely, 2^990111407 is an apocalyptic number.

990111407 is a deficient number, since it is larger than the sum of its proper divisors (7743793).

990111407 is a wasteful number, since it uses less digits than its factorization.

990111407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7473.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 990111407 is about 31466.0357687460. The cubic root of 990111407 is about 996.6928773297.

The spelling of 990111407 in words is "nine hundred ninety million, one hundred eleven thousand, four hundred seven".