1993745 has 16 divisors (see below), whose sum is σ = 2649360. Its totient is φ = 1430784.

The previous prime is 1993729. The next prime is 1993757. The reversal of 1993745 is 5473991.

It is a happy number.

It is a Cunningham number, because it is equal to 1412²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 1 + 1993744 = 1^2 + 1412^2 .

It is a cyclic number.

It is not a de Polignac number, because 1993745 - 2⁴ = 1993729 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1993699 and 1993708.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1991 + ... + 2819.

It is an arithmetic number, because the mean of its divisors is an integer number (165585).

2^1993745 is an apocalyptic number.

It is an amenable number.

1993745 is a deficient number, since it is larger than the sum of its proper divisors (655615).

1993745 is a wasteful number, since it uses less digits than its factorization.

1993745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884.

The product of its digits is 34020, while the sum is 38.

The square root of 1993745 is about 1412.0003541076. Note that the first 3 decimals coincide. The cubic root of 1993745 is about 125.8606210526.

The spelling of 1993745 in words is "one million, nine hundred ninety-three thousand, seven hundred forty-five".