1994473 has 4 divisors (see below), whose sum is σ = 2147908. Its totient is φ = 1841040.

The previous prime is 1994471. The next prime is 1994477. The reversal of 1994473 is 3744991.

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 322624 + 1671849 = 568^2 + 1293^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994473 - 2¹ = 1994471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1994471) 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, 76698 + ... + 76723.

It is an arithmetic number, because the mean of its divisors is an integer number (536977).

2^1994473 is an apocalyptic number.

1994473 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1994473 is a deficient number, since it is larger than the sum of its proper divisors (153435).

1994473 is a wasteful number, since it uses less digits than its factorization.

1994473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153434.

The product of its digits is 27216, while the sum is 37.

The square root of 1994473 is about 1412.2581208830. The cubic root of 1994473 is about 125.8759381873.

The spelling of 1994473 in words is "one million, nine hundred ninety-four thousand, four hundred seventy-three".