1389518563 has 4 divisors (see below), whose sum is σ = 1390531968. Its totient is φ = 1388505160.

The previous prime is 1389518497. The next prime is 1389518587. The reversal of 1389518563 is 3658159831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3658159831 = 59 ⋅62002709.

It is a cyclic number.

It is not a de Polignac number, because 1389518563 - 2¹³ = 1389510371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389518863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504643 + ... + 507388.

It is an arithmetic number, because the mean of its divisors is an integer number (347632992).

Almost surely, 2^1389518563 is an apocalyptic number.

1389518563 is a deficient number, since it is larger than the sum of its proper divisors (1013405).

1389518563 is a wasteful number, since it uses less digits than its factorization.

1389518563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013404.

The product of its digits is 777600, while the sum is 49.

The square root of 1389518563 is about 37276.2466324065. The cubic root of 1389518563 is about 1115.8901678352.

The spelling of 1389518563 in words is "one billion, three hundred eighty-nine million, five hundred eighteen thousand, five hundred sixty-three".