1389503785 has 8 divisors (see below), whose sum is σ = 1670595840. Its totient is φ = 1109475504.

The previous prime is 1389503783. The next prime is 1389503873. The reversal of 1389503785 is 5873059831.

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 1389503785 - 2¹ = 1389503783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1389503783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263065 + ... + 268294.

It is an arithmetic number, because the mean of its divisors is an integer number (208824480).

Almost surely, 2^1389503785 is an apocalyptic number.

It is an amenable number.

1389503785 is a deficient number, since it is larger than the sum of its proper divisors (281092055).

1389503785 is an equidigital number, since it uses as much as digits as its factorization.

1389503785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531887.

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 1389503785 is about 37276.0484091326. The cubic root of 1389503785 is about 1115.8862118647.

The spelling of 1389503785 in words is "one billion, three hundred eighty-nine million, five hundred three thousand, seven hundred eighty-five".