1566983 has 4 divisors (see below), whose sum is σ = 1709448. Its totient is φ = 1424520.

The previous prime is 1566953. The next prime is 1566997. The reversal of 1566983 is 3896651.

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 1566983 - 2¹² = 1562887 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 (1566923) 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, 71216 + ... + 71237.

It is an arithmetic number, because the mean of its divisors is an integer number (427362).

2^1566983 is an apocalyptic number.

1566983 is a deficient number, since it is larger than the sum of its proper divisors (142465).

1566983 is a wasteful number, since it uses less digits than its factorization.

1566983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142464.

The product of its digits is 38880, while the sum is 38.

The square root of 1566983 is about 1251.7919156154. The cubic root of 1566983 is about 116.1505921681.

The spelling of 1566983 in words is "one million, five hundred sixty-six thousand, nine hundred eighty-three".