1994533 has 4 divisors (see below), whose sum is σ = 2063340. Its totient is φ = 1925728.

The previous prime is 1994521. The next prime is 1994543. The reversal of 1994533 is 3354991.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1216609 + 777924 = 1103^2 + 882^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994533 - 2⁵ = 1994501 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 (1994543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34360 + ... + 34417.

It is an arithmetic number, because the mean of its divisors is an integer number (515835).

2^1994533 is an apocalyptic number.

It is an amenable number.

1994533 is a deficient number, since it is larger than the sum of its proper divisors (68807).

1994533 is an equidigital number, since it uses as much as digits as its factorization.

1994533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68806.

The product of its digits is 14580, while the sum is 34.

The square root of 1994533 is about 1412.2793632989. The cubic root of 1994533 is about 125.8772004223.

The spelling of 1994533 in words is "one million, nine hundred ninety-four thousand, five hundred thirty-three".