1330538989 has 4 divisors (see below), whose sum is σ = 1432888156. Its totient is φ = 1228189824.

The previous prime is 1330538987. The next prime is 1330539037. The reversal of 1330538989 is 9898350331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 776736900 + 553802089 = 27870^2 + 23533^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330538989 - 2¹ = 1330538987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330538987) 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, 51174564 + ... + 51174589.

It is an arithmetic number, because the mean of its divisors is an integer number (358222039).

Almost surely, 2^1330538989 is an apocalyptic number.

It is an amenable number.

1330538989 is a deficient number, since it is larger than the sum of its proper divisors (102349167).

1330538989 is a wasteful number, since it uses less digits than its factorization.

1330538989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102349166.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 1330538989 is about 36476.5539627855. The cubic root of 1330538989 is about 1099.8729850589.

The spelling of 1330538989 in words is "one billion, three hundred thirty million, five hundred thirty-eight thousand, nine hundred eighty-nine".