1997673 has 8 divisors (see below), whose sum is σ = 2697600. Its totient is φ = 1314768.

The previous prime is 1997663. The next prime is 1997683. The reversal of 1997673 is 3767991.

It is an interprime number because it is at equal distance from previous prime (1997663) and next prime (1997683).

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

It is not a de Polignac number, because 1997673 - 2⁴ = 1997657 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

1997673 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1997663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3978 + ... + 4451.

It is an arithmetic number, because the mean of its divisors is an integer number (337200).

2^1997673 is an apocalyptic number.

It is an amenable number.

1997673 is a deficient number, since it is larger than the sum of its proper divisors (699927).

1997673 is an equidigital number, since it uses as much as digits as its factorization.

1997673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8511.

The product of its digits is 71442, while the sum is 42.

The square root of 1997673 is about 1413.3906041856. The cubic root of 1997673 is about 125.9432220881.

The spelling of 1997673 in words is "one million, nine hundred ninety-seven thousand, six hundred seventy-three".