1313487918 has 48 divisors (see below), whose sum is σ = 2941526016. Its totient is φ = 423153360.

The previous prime is 1313487893. The next prime is 1313487919. The reversal of 1313487918 is 8197843131.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313487919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 828955 + ... + 830537.

It is an arithmetic number, because the mean of its divisors is an integer number (61281792).

Almost surely, 2^1313487918 is an apocalyptic number.

1313487918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1313487918 is an abundant number, since it is smaller than the sum of its proper divisors (1628038098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1313487918 is a wasteful number, since it uses less digits than its factorization.

1313487918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109 (or 3106 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1313487918 is about 36242.0738645017. The cubic root of 1313487918 is about 1095.1544212068.

The spelling of 1313487918 in words is "one billion, three hundred thirteen million, four hundred eighty-seven thousand, nine hundred eighteen".