1317993 has 16 divisors (see below), whose sum is σ = 1907136. Its totient is φ = 806400.

The previous prime is 1317989. The next prime is 1318003. The reversal of 1317993 is 3997131.

It is not a de Polignac number, because 1317993 - 2² = 1317989 is a prime.

It is a Curzon number.

1317993 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1317193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1893 + ... + 2493.

It is an arithmetic number, because the mean of its divisors is an integer number (119196).

2^1317993 is an apocalyptic number.

It is an amenable number.

1317993 is a deficient number, since it is larger than the sum of its proper divisors (589143).

1317993 is a wasteful number, since it uses less digits than its factorization.

1317993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its digits is 5103, while the sum is 33.

The square root of 1317993 is about 1148.0387624118. The cubic root of 1317993 is about 109.6405068541.

The spelling of 1317993 in words is "one million, three hundred seventeen thousand, nine hundred ninety-three".