1329981027 has 4 divisors (see below), whose sum is σ = 1773308040. Its totient is φ = 886654016.

The previous prime is 1329980989. The next prime is 1329981031. The reversal of 1329981027 is 7201899231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7201899231 = 3 ⋅2400633077.

It is a cyclic number.

It is not a de Polignac number, because 1329981027 - 2¹⁸ = 1329718883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1329981027.

It is not an unprimeable number, because it can be changed into a prime (1329981047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221663502 + ... + 221663507.

It is an arithmetic number, because the mean of its divisors is an integer number (443327010).

Almost surely, 2^1329981027 is an apocalyptic number.

1329981027 is a deficient number, since it is larger than the sum of its proper divisors (443327013).

1329981027 is an equidigital number, since it uses as much as digits as its factorization.

1329981027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443327012.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1329981027 is about 36468.9049328328. The cubic root of 1329981027 is about 1099.7192195201.

The spelling of 1329981027 in words is "one billion, three hundred twenty-nine million, nine hundred eighty-one thousand, twenty-seven".