1993117 has 4 divisors (see below), whose sum is σ = 2277856. Its totient is φ = 1708380.

The previous prime is 1993109. The next prime is 1993127. The reversal of 1993117 is 7113991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7113991 = 1289 ⋅5519.

It is a cyclic number.

It is not a de Polignac number, because 1993117 - 2³ = 1993109 is a prime.

1993117 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142359 + ... + 142372.

It is an arithmetic number, because the mean of its divisors is an integer number (569464).

2^1993117 is an apocalyptic number.

It is an amenable number.

1993117 is a deficient number, since it is larger than the sum of its proper divisors (284739).

1993117 is an equidigital number, since it uses as much as digits as its factorization.

1993117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284738.

The product of its digits is 1701, while the sum is 31.

The square root of 1993117 is about 1411.7779570457. Note that the first 3 decimals coincide. The cubic root of 1993117 is about 125.8474049241.

The spelling of 1993117 in words is "one million, nine hundred ninety-three thousand, one hundred seventeen".