1378368489 has 4 divisors (see below), whose sum is σ = 1837824656. Its totient is φ = 918912324.

The previous prime is 1378368479. The next prime is 1378368503. The reversal of 1378368489 is 9848638731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1378368489 - 2¹¹ = 1378366441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378368479) 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, 229728079 + ... + 229728084.

It is an arithmetic number, because the mean of its divisors is an integer number (459456164).

Almost surely, 2^1378368489 is an apocalyptic number.

It is an amenable number.

1378368489 is a deficient number, since it is larger than the sum of its proper divisors (459456167).

1378368489 is an equidigital number, since it uses as much as digits as its factorization.

1378368489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459456166.

The product of its digits is 6967296, while the sum is 57.

The square root of 1378368489 is about 37126.3853478897. The cubic root of 1378368489 is about 1112.8973596166.

The spelling of 1378368489 in words is "one billion, three hundred seventy-eight million, three hundred sixty-eight thousand, four hundred eighty-nine".