1994653 has 4 divisors (see below), whose sum is σ = 1997500. Its totient is φ = 1991808.

The previous prime is 1994651. The next prime is 1994659. The reversal of 1994653 is 3564991.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3564991 = 41 ⋅86951.

It can be written as a sum of positive squares in 2 ways, for example, as 597529 + 1397124 = 773^2 + 1182^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994653 - 2¹ = 1994651 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 (1994651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451 + ... + 2047.

It is an arithmetic number, because the mean of its divisors is an integer number (499375).

2^1994653 is an apocalyptic number.

It is an amenable number.

1994653 is a deficient number, since it is larger than the sum of its proper divisors (2847).

1994653 is a wasteful number, since it uses less digits than its factorization.

1994653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846.

The product of its digits is 29160, while the sum is 37.

The square root of 1994653 is about 1412.3218471722. The cubic root of 1994653 is about 125.8797248162.

The spelling of 1994653 in words is "one million, nine hundred ninety-four thousand, six hundred fifty-three".