1344557789 has 4 divisors (see below), whose sum is σ = 1345262556. Its totient is φ = 1343853024.

The previous prime is 1344557779. The next prime is 1344557803. The reversal of 1344557789 is 9877554431.

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 1040578564 + 303979225 = 32258^2 + 17435^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344557789 - 2²⁰ = 1343509213 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1344557789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1344557729) 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, 349514 + ... + 353339.

It is an arithmetic number, because the mean of its divisors is an integer number (336315639).

Almost surely, 2^1344557789 is an apocalyptic number.

It is an amenable number.

1344557789 is a deficient number, since it is larger than the sum of its proper divisors (704767).

1344557789 is an equidigital number, since it uses as much as digits as its factorization.

1344557789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704766.

The product of its digits is 4233600, while the sum is 53.

The square root of 1344557789 is about 36668.2122416679. The cubic root of 1344557789 is about 1103.7223178456.

The spelling of 1344557789 in words is "one billion, three hundred forty-four million, five hundred fifty-seven thousand, seven hundred eighty-nine".