1388347 has 4 divisors (see below), whose sum is σ = 1392696. Its totient is φ = 1384000.

The previous prime is 1388327. The next prime is 1388353. The reversal of 1388347 is 7438831.

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 1388347 - 2¹⁵ = 1355579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654 + ... + 2347.

It is an arithmetic number, because the mean of its divisors is an integer number (348174).

2^1388347 is an apocalyptic number.

1388347 is a deficient number, since it is larger than the sum of its proper divisors (4349).

1388347 is an equidigital number, since it uses as much as digits as its factorization.

1388347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4348.

The product of its digits is 16128, while the sum is 34.

The square root of 1388347 is about 1178.2813755636. The cubic root of 1388347 is about 111.5576461284.

It can be divided in two parts, 1388 and 347, that multiplied together give a square (481636 = 694²).

The spelling of 1388347 in words is "one million, three hundred eighty-eight thousand, three hundred forty-seven".