1389557105 has 8 divisors (see below), whose sum is σ = 1683052992. Its totient is φ = 1101256048.

The previous prime is 1389557093. The next prime is 1389557123. The reversal of 1389557105 is 5017559831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1389557105 - 2³⁰ = 315815281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1298117 + ... + 1299186.

It is an arithmetic number, because the mean of its divisors is an integer number (210381624).

Almost surely, 2^1389557105 is an apocalyptic number.

It is an amenable number.

1389557105 is a deficient number, since it is larger than the sum of its proper divisors (293495887).

1389557105 is a wasteful number, since it uses less digits than its factorization.

1389557105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597415.

The product of its (nonzero) digits is 189000, while the sum is 44.

The square root of 1389557105 is about 37276.7636068369. The cubic root of 1389557105 is about 1115.9004851356.

The spelling of 1389557105 in words is "one billion, three hundred eighty-nine million, five hundred fifty-seven thousand, one hundred five".