1318917 has 4 divisors (see below), whose sum is σ = 1758560. Its totient is φ = 879276.

The previous prime is 1318913. The next prime is 1318927. The reversal of 1318917 is 7198131.

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.

It is not a de Polignac number, because 1318917 - 2² = 1318913 is a prime.

It is a D-number.

It is a Duffinian number.

1318917 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219817 + ... + 219822.

It is an arithmetic number, because the mean of its divisors is an integer number (439640).

2^1318917 is an apocalyptic number.

It is an amenable number.

1318917 is a deficient number, since it is larger than the sum of its proper divisors (439643).

1318917 is an equidigital number, since it uses as much as digits as its factorization.

1318917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439642.

The product of its digits is 1512, while the sum is 30.

The square root of 1318917 is about 1148.4411173412. The cubic root of 1318917 is about 109.6661226105. Note that the first 3 decimals are identical.

The spelling of 1318917 in words is "one million, three hundred eighteen thousand, nine hundred seventeen".