1331983 has 4 divisors (see below), whose sum is σ = 1335928. Its totient is φ = 1328040.

The previous prime is 1331969. The next prime is 1331987. The reversal of 1331983 is 3891331.

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

It is a cyclic number.

It is not a de Polignac number, because 1331983 - 2⁵ = 1331951 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 (1331987) 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, 1413 + ... + 2158.

It is an arithmetic number, because the mean of its divisors is an integer number (333982).

2^1331983 is an apocalyptic number.

1331983 is a deficient number, since it is larger than the sum of its proper divisors (3945).

1331983 is an equidigital number, since it uses as much as digits as its factorization.

1331983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944.

The product of its digits is 1944, while the sum is 28.

The square root of 1331983 is about 1154.1156787775. The cubic root of 1331983 is about 110.0270732260.

It can be divided in two parts, 133 and 1983, that added together give a square (2116 = 46²).

The spelling of 1331983 in words is "one million, three hundred thirty-one thousand, nine hundred eighty-three".