1393009 has 4 divisors (see below), whose sum is σ = 1396980. Its totient is φ = 1389040.

The previous prime is 1393003. The next prime is 1393019. The reversal of 1393009 is 9003931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 815409 + 577600 = 903^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1393009 - 2⁵ = 1392977 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393003) 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, 1402 + ... + 2179.

It is an arithmetic number, because the mean of its divisors is an integer number (349245).

2^1393009 is an apocalyptic number.

It is an amenable number.

1393009 is a deficient number, since it is larger than the sum of its proper divisors (3971).

1393009 is an equidigital number, since it uses as much as digits as its factorization.

1393009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3970.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 1393009 is about 1180.2580226374. The cubic root of 1393009 is about 111.6823749591.

The spelling of 1393009 in words is "one million, three hundred ninety-three thousand, nine".