1388103489 has 6 divisors (see below), whose sum is σ = 2005038386. Its totient is φ = 925402320.

The previous prime is 1388103469. The next prime is 1388103529. The reversal of 1388103489 is 9843018831.

It can be written as a sum of positive squares in only one way, i.e., 1293625089 + 94478400 = 35967^2 + 9720^2 .

It is not a de Polignac number, because 1388103489 - 2⁹ = 1388102977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388103419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77116852 + ... + 77116869.

Almost surely, 2^1388103489 is an apocalyptic number.

It is an amenable number.

1388103489 is a deficient number, since it is larger than the sum of its proper divisors (616934897).

1388103489 is a wasteful number, since it uses less digits than its factorization.

1388103489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154233727 (or 154233724 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1388103489 is about 37257.2608896575. The cubic root of 1388103489 is about 1115.5112347896.

The spelling of 1388103489 in words is "one billion, three hundred eighty-eight million, one hundred three thousand, four hundred eighty-nine".