1329399 has 16 divisors (see below), whose sum is σ = 2008800. Its totient is φ = 868608.

The previous prime is 1329397. The next prime is 1329407. The reversal of 1329399 is 9939231.

It is not a de Polignac number, because 1329399 - 2¹ = 1329397 is a prime.

1329399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 967 + ... + 1895.

It is an arithmetic number, because the mean of its divisors is an integer number (125550).

2^1329399 is an apocalyptic number.

1329399 is a deficient number, since it is larger than the sum of its proper divisors (679401).

1329399 is an equidigital number, since it uses as much as digits as its factorization.

1329399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991 (or 985 counting only the distinct ones).

The product of its digits is 13122, while the sum is 36.

The square root of 1329399 is about 1152.9956634784. The cubic root of 1329399 is about 109.9558776211.

It can be divided in two parts, 1329 and 399, that added together give a cube (1728 = 12³).

The spelling of 1329399 in words is "one million, three hundred twenty-nine thousand, three hundred ninety-nine".