1386823 has 2 divisors, whose sum is σ = 1386824. Its totient is φ = 1386822.

The previous prime is 1386821. The next prime is 1386839. The reversal of 1386823 is 3286831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1386823 - 2¹ = 1386821 is a prime.

Together with 1386821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1386821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693411 + 693412.

It is an arithmetic number, because the mean of its divisors is an integer number (693412).

2^1386823 is an apocalyptic number.

1386823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386823 is an equidigital number, since it uses as much as digits as its factorization.

1386823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 1386823 is about 1177.6344933807. The cubic root of 1386823 is about 111.5168119327.

It can be divided in two parts, 1386 and 823, that added together give a square (2209 = 47²).

The spelling of 1386823 in words is "one million, three hundred eighty-six thousand, eight hundred twenty-three".