1313918 has 4 divisors (see below), whose sum is σ = 1970880. Its totient is φ = 656958.

The previous prime is 1313911. The next prime is 1313929. The reversal of 1313918 is 8193131.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328478 + ... + 328481.

It is an arithmetic number, because the mean of its divisors is an integer number (492720).

2^1313918 is an apocalyptic number.

1313918 is a deficient number, since it is larger than the sum of its proper divisors (656962).

1313918 is an equidigital number, since it uses as much as digits as its factorization.

1313918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656961.

The product of its digits is 648, while the sum is 26.

The square root of 1313918 is about 1146.2626226132. The cubic root of 1313918 is about 109.5273938816.

It can be divided in two parts, 13 and 13918, that added together give a palindrome (13931).

The spelling of 1313918 in words is "one million, three hundred thirteen thousand, nine hundred eighteen".