1387329 has 4 divisors (see below), whose sum is σ = 1849776. Its totient is φ = 924884.

The previous prime is 1387327. The next prime is 1387349. The reversal of 1387329 is 9237831.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9237831 = 3 ⋅3079277.

It is a cyclic number.

It is not a de Polignac number, because 1387329 - 2¹ = 1387327 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1387329.

It is not an unprimeable number, because it can be changed into a prime (1387327) 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, 231219 + ... + 231224.

It is an arithmetic number, because the mean of its divisors is an integer number (462444).

2^1387329 is an apocalyptic number.

It is an amenable number.

1387329 is a deficient number, since it is larger than the sum of its proper divisors (462447).

1387329 is an equidigital number, since it uses as much as digits as its factorization.

1387329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462446.

The product of its digits is 9072, while the sum is 33.

The square root of 1387329 is about 1177.8493112449. The cubic root of 1387329 is about 111.5303730590.

The spelling of 1387329 in words is "one million, three hundred eighty-seven thousand, three hundred twenty-nine".