1393409 has 8 divisors (see below), whose sum is σ = 1486080. Its totient is φ = 1303456.

The previous prime is 1393397. The next prime is 1393417. The reversal of 1393409 is 9043931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1393409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1393459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437 + ... + 1725.

It is an arithmetic number, because the mean of its divisors is an integer number (185760).

2^1393409 is an apocalyptic number.

It is an amenable number.

1393409 is a deficient number, since it is larger than the sum of its proper divisors (92671).

1393409 is a wasteful number, since it uses less digits than its factorization.

1393409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 1393409 is about 1180.4274649465. The cubic root of 1393409 is about 111.6930637330.

It can be divided in two parts, 139 and 3409, that multiplied together give a triangular number (473851 = T₉₇₃).

The spelling of 1393409 in words is "one million, three hundred ninety-three thousand, four hundred nine".