1991114 has 8 divisors (see below), whose sum is σ = 3016548. Its totient is φ = 985600.

The previous prime is 1991107. The next prime is 1991123. The reversal of 1991114 is 4111991.

It can be written as a sum of positive squares in 2 ways, for example, as 1890625 + 100489 = 1375^2 + 317^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4727 + ... + 5130.

2^1991114 is an apocalyptic number.

1991114 is a deficient number, since it is larger than the sum of its proper divisors (1025434).

1991114 is a wasteful number, since it uses less digits than its factorization.

1991114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9960.

The product of its digits is 324, while the sum is 26.

The square root of 1991114 is about 1411.0683895545. The cubic root of 1991114 is about 125.8052336517.

The spelling of 1991114 in words is "one million, nine hundred ninety-one thousand, one hundred fourteen".