1994891 has 4 divisors (see below), whose sum is σ = 1998192. Its totient is φ = 1991592.

The previous prime is 1994879. The next prime is 1994897. The reversal of 1994891 is 1984991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1994891 - 2⁶ = 1994827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1994897) by changing a digit.

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, 455 + ... + 2048.

It is an arithmetic number, because the mean of its divisors is an integer number (499548).

2^1994891 is an apocalyptic number.

1994891 is a deficient number, since it is larger than the sum of its proper divisors (3301).

1994891 is an equidigital number, since it uses as much as digits as its factorization.

1994891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300.

The product of its digits is 23328, while the sum is 41.

The square root of 1994891 is about 1412.4061030738. The cubic root of 1994891 is about 125.8847312314.

The spelling of 1994891 in words is "one million, nine hundred ninety-four thousand, eight hundred ninety-one".