1990011 has 8 divisors (see below), whose sum is σ = 2698560. Its totient is φ = 1304072.

The previous prime is 1990007. The next prime is 1990031. The reversal of 1990011 is 1100991.

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 1990011 - 2² = 1990007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1990011.

It is not an unprimeable number, because it can be changed into a prime (1990031) 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, 5445 + ... + 5798.

It is an arithmetic number, because the mean of its divisors is an integer number (337320).

2^1990011 is an apocalyptic number.

1990011 is a deficient number, since it is larger than the sum of its proper divisors (708549).

1990011 is a wasteful number, since it uses less digits than its factorization.

1990011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11305.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 1990011 is about 1410.6774968078. The cubic root of 1990011 is about 125.7819989526.

The spelling of 1990011 in words is "one million, nine hundred ninety thousand, eleven".