1349138489 has 4 divisors (see below), whose sum is σ = 1349213220. Its totient is φ = 1349063760.

The previous prime is 1349138473. The next prime is 1349138503. The reversal of 1349138489 is 9848319431.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9848319431 = 38153 ⋅258127.

It can be written as a sum of positive squares in 2 ways, for example, as 620408464 + 728730025 = 24908^2 + 26995^2 .

It is a cyclic number.

It is not a de Polignac number, because 1349138489 - 2⁴ = 1349138473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1349138789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8399 + ... + 52619.

It is an arithmetic number, because the mean of its divisors is an integer number (337303305).

Almost surely, 2^1349138489 is an apocalyptic number.

It is an amenable number.

1349138489 is a deficient number, since it is larger than the sum of its proper divisors (74731).

1349138489 is an equidigital number, since it uses as much as digits as its factorization.

1349138489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74730.

The product of its digits is 746496, while the sum is 50.

The square root of 1349138489 is about 36730.6205910001. The cubic root of 1349138489 is about 1104.9743007748.

The spelling of 1349138489 in words is "one billion, three hundred forty-nine million, one hundred thirty-eight thousand, four hundred eighty-nine".