1313391 has 8 divisors (see below), whose sum is σ = 1780144. Its totient is φ = 861120.

The previous prime is 1313383. The next prime is 1313423. The reversal of 1313391 is 1933131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1313391 - 2³ = 1313383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3406 + ... + 3771.

It is an arithmetic number, because the mean of its divisors is an integer number (222518).

2^1313391 is an apocalyptic number.

1313391 is a deficient number, since it is larger than the sum of its proper divisors (466753).

1313391 is an equidigital number, since it uses as much as digits as its factorization.

1313391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7241.

The product of its digits is 243, while the sum is 21.

The square root of 1313391 is about 1146.0327220459. The cubic root of 1313391 is about 109.5127484584.

The spelling of 1313391 in words is "one million, three hundred thirteen thousand, three hundred ninety-one".