1313887 has 4 divisors (see below), whose sum is σ = 1319760. Its totient is φ = 1308016.

The previous prime is 1313881. The next prime is 1313891. The reversal of 1313887 is 7883131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313887 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1313887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2587 + ... + 3052.

It is an arithmetic number, because the mean of its divisors is an integer number (329940).

2^1313887 is an apocalyptic number.

1313887 is a deficient number, since it is larger than the sum of its proper divisors (5873).

1313887 is an equidigital number, since it uses as much as digits as its factorization.

1313887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5872.

The product of its digits is 4032, while the sum is 31.

The square root of 1313887 is about 1146.2491003268. The cubic root of 1313887 is about 109.5265324945.

It can be divided in two parts, 13138 and 87, that added together give a square (13225 = 115²).

The spelling of 1313887 in words is "one million, three hundred thirteen thousand, eight hundred eighty-seven".