1338660889 has 4 divisors (see below), whose sum is σ = 1339122724. Its totient is φ = 1338199056.

The previous prime is 1338660887. The next prime is 1338660893. The reversal of 1338660889 is 9880668331.

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 845820889 + 492840000 = 29083^2 + 22200^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338660889 - 2¹ = 1338660887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338660887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226542 + ... + 232375.

It is an arithmetic number, because the mean of its divisors is an integer number (334780681).

Almost surely, 2^1338660889 is an apocalyptic number.

It is an amenable number.

1338660889 is a deficient number, since it is larger than the sum of its proper divisors (461835).

1338660889 is an equidigital number, since it uses as much as digits as its factorization.

1338660889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461834.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The square root of 1338660889 is about 36587.7150010765. The cubic root of 1338660889 is about 1102.1064015958.

The spelling of 1338660889 in words is "one billion, three hundred thirty-eight million, six hundred sixty thousand, eight hundred eighty-nine".