1664983 has 4 divisors (see below), whose sum is σ = 1667848. Its totient is φ = 1662120.

The previous prime is 1664959. The next prime is 1664987. The reversal of 1664983 is 3894661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3894661 = 101 ⋅38561.

It is a cyclic number.

It is not a de Polignac number, because 1664983 - 2¹³ = 1656791 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 (1664987) 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, 216 + ... + 1837.

It is an arithmetic number, because the mean of its divisors is an integer number (416962).

2^1664983 is an apocalyptic number.

1664983 is a deficient number, since it is larger than the sum of its proper divisors (2865).

1664983 is an equidigital number, since it uses as much as digits as its factorization.

1664983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864.

The product of its digits is 31104, while the sum is 37.

The square root of 1664983 is about 1290.3422026734. The cubic root of 1664983 is about 118.5231725470.

The spelling of 1664983 in words is "one million, six hundred sixty-four thousand, nine hundred eighty-three".