1983745 has 8 divisors (see below), whose sum is σ = 2462760. Its totient is φ = 1532160.

The previous prime is 1983743. The next prime is 1983749. The reversal of 1983745 is 5473891.

It can be written as a sum of positive squares in 4 ways, for example, as 628849 + 1354896 = 793^2 + 1164^2 .

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

It is not a de Polignac number, because 1983745 - 2¹ = 1983743 is a prime.

It is a d-powerful number, because it can be written as 1 + 9³ + 8⁵ + 3 + 7⁷ + 4¹⁰ + 5⁷ .

It is not an unprimeable number, because it can be changed into a prime (1983743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6696 + ... + 6985.

It is an arithmetic number, because the mean of its divisors is an integer number (307845).

2^1983745 is an apocalyptic number.

It is an amenable number.

1983745 is a deficient number, since it is larger than the sum of its proper divisors (479015).

1983745 is a wasteful number, since it uses less digits than its factorization.

1983745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13715.

The product of its digits is 30240, while the sum is 37.

The square root of 1983745 is about 1408.4548271066. The cubic root of 1983745 is about 125.6498424506.

The spelling of 1983745 in words is "one million, nine hundred eighty-three thousand, seven hundred forty-five".