1329979 has 4 divisors (see below), whose sum is σ = 1519984. Its totient is φ = 1139976.

The previous prime is 1329971. The next prime is 1330001. The reversal of 1329979 is 9799231.

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 1329979 - 2³ = 1329971 is a prime.

It is a Duffinian number.

1329979 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1329971) 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 3 ways as a sum of consecutive naturals, for example, 94992 + ... + 95005.

It is an arithmetic number, because the mean of its divisors is an integer number (379996).

2^1329979 is an apocalyptic number.

1329979 is a deficient number, since it is larger than the sum of its proper divisors (190005).

1329979 is an equidigital number, since it uses as much as digits as its factorization.

1329979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190004.

The product of its digits is 30618, while the sum is 40.

The square root of 1329979 is about 1153.2471547765. The cubic root of 1329979 is about 109.9718660832.

It can be divided in two parts, 13 and 29979, that added together give a palindrome (29992).

The spelling of 1329979 in words is "one million, three hundred twenty-nine thousand, nine hundred seventy-nine".