1330994779 has 4 divisors (see below), whose sum is σ = 1332349776. Its totient is φ = 1329639784.

The previous prime is 1330994773. The next prime is 1330994809. The reversal of 1330994779 is 9774990331.

It is a happy number.

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 1330994779 - 2¹⁷ = 1330863707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1330994773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676024 + ... + 677989.

It is an arithmetic number, because the mean of its divisors is an integer number (333087444).

Almost surely, 2^1330994779 is an apocalyptic number.

1330994779 is a deficient number, since it is larger than the sum of its proper divisors (1354997).

1330994779 is an equidigital number, since it uses as much as digits as its factorization.

1330994779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354996.

The product of its (nonzero) digits is 1285956, while the sum is 52.

The square root of 1330994779 is about 36482.8011397151. The cubic root of 1330994779 is about 1099.9985617061.

The spelling of 1330994779 in words is "one billion, three hundred thirty million, nine hundred ninety-four thousand, seven hundred seventy-nine".