1997983 has 8 divisors (see below), whose sum is σ = 2265200. Its totient is φ = 1747008.

The previous prime is 1997969. The next prime is 1997999. The reversal of 1997983 is 3897991.

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

It is a cyclic number.

It is not a de Polignac number, because 1997983 - 2¹³ = 1989791 is a prime.

It is the 1414-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997903) by changing a digit.

It is a nontrivial repunit in base 1413.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3798 + ... + 4291.

It is an arithmetic number, because the mean of its divisors is an integer number (283150).

2^1997983 is an apocalyptic number.

1997983 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1997983 is a deficient number, since it is larger than the sum of its proper divisors (267217).

1997983 is a wasteful number, since it uses less digits than its factorization.

1997983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8121.

The product of its digits is 122472, while the sum is 46.

The square root of 1997983 is about 1413.5002652989. The cubic root of 1997983 is about 125.9497363974.

The spelling of 1997983 in words is "one million, nine hundred ninety-seven thousand, nine hundred eighty-three".