1386309 has 4 divisors (see below), whose sum is σ = 1848416. Its totient is φ = 924204.

The previous prime is 1386293. The next prime is 1386311. The reversal of 1386309 is 9036831.

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.

It is not a de Polignac number, because 1386309 - 2⁴ = 1386293 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386379) 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, 231049 + ... + 231054.

It is an arithmetic number, because the mean of its divisors is an integer number (462104).

2^1386309 is an apocalyptic number.

It is an amenable number.

1386309 is a deficient number, since it is larger than the sum of its proper divisors (462107).

1386309 is an equidigital number, since it uses as much as digits as its factorization.

1386309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462106.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1386309 is about 1177.4162390591. The cubic root of 1386309 is about 111.5030330236.

The spelling of 1386309 in words is "one million, three hundred eighty-six thousand, three hundred nine".