1316823 has 4 divisors (see below), whose sum is σ = 1755768. Its totient is φ = 877880.

The previous prime is 1316813. The next prime is 1316831. The reversal of 1316823 is 3286131.

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

It is a cyclic number.

It is not a de Polignac number, because 1316823 - 2⁹ = 1316311 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1316793 and 1316802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316813) 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, 219468 + ... + 219473.

It is an arithmetic number, because the mean of its divisors is an integer number (438942).

2^1316823 is an apocalyptic number.

1316823 is a deficient number, since it is larger than the sum of its proper divisors (438945).

1316823 is an equidigital number, since it uses as much as digits as its factorization.

1316823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438944.

The product of its digits is 864, while the sum is 24.

The square root of 1316823 is about 1147.5290845987. The cubic root of 1316823 is about 109.6080541349.

It can be divided in two parts, 13 and 16823, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 1316823 in words is "one million, three hundred sixteen thousand, eight hundred twenty-three".