1389042889 has 8 divisors (see below), whose sum is σ = 1530681152. Its totient is φ = 1252374480.

The previous prime is 1389042883. The next prime is 1389042923. The reversal of 1389042889 is 9882409831.

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 1389042889 - 2³ = 1389042881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1389042881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241877 + ... + 1242994.

It is an arithmetic number, because the mean of its divisors is an integer number (191335144).

Almost surely, 2^1389042889 is an apocalyptic number.

It is an amenable number.

1389042889 is a deficient number, since it is larger than the sum of its proper divisors (141638263).

1389042889 is a wasteful number, since it uses less digits than its factorization.

1389042889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484927.

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 1389042889 is about 37269.8656960285. The cubic root of 1389042889 is about 1115.7628190457.

The spelling of 1389042889 in words is "one billion, three hundred eighty-nine million, forty-two thousand, eight hundred eighty-nine".