1983406 has 4 divisors (see below), whose sum is σ = 2975112. Its totient is φ = 991702.

The previous prime is 1983389. The next prime is 1983409. The reversal of 1983406 is 6043891.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495850 + ... + 495853.

It is an arithmetic number, because the mean of its divisors is an integer number (743778).

2^1983406 is an apocalyptic number.

1983406 is a deficient number, since it is larger than the sum of its proper divisors (991706).

1983406 is an equidigital number, since it uses as much as digits as its factorization.

1983406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991705.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1983406 is about 1408.3344773171. The cubic root of 1983406 is about 125.6426846551.

The spelling of 1983406 in words is "one million, nine hundred eighty-three thousand, four hundred six".