1318613 has 4 divisors (see below), whose sum is σ = 1375968. Its totient is φ = 1261260.

The previous prime is 1318609. The next prime is 1318633. The reversal of 1318613 is 3168131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3168131 = 151 ⋅20981.

It is a cyclic number.

It is not a de Polignac number, because 1318613 - 2² = 1318609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 57331 = 1318613 / (1 + 3 + 1 + 8 + 6 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28643 + ... + 28688.

It is an arithmetic number, because the mean of its divisors is an integer number (343992).

2^1318613 is an apocalyptic number.

It is an amenable number.

1318613 is a deficient number, since it is larger than the sum of its proper divisors (57355).

1318613 is an equidigital number, since it uses as much as digits as its factorization.

1318613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57354.

The product of its digits is 432, while the sum is 23.

The square root of 1318613 is about 1148.3087563892. The cubic root of 1318613 is about 109.6576962367.

The spelling of 1318613 in words is "one million, three hundred eighteen thousand, six hundred thirteen".