1389306903 has 8 divisors (see below), whose sum is σ = 1882776816. Its totient is φ = 911020800.

The previous prime is 1389306883. The next prime is 1389306907. The reversal of 1389306903 is 3096039831.

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

It is not a de Polignac number, because 1389306903 - 2⁸ = 1389306647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389306907) 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, 3795738 + ... + 3796103.

It is an arithmetic number, because the mean of its divisors is an integer number (235347102).

Almost surely, 2^1389306903 is an apocalyptic number.

1389306903 is a deficient number, since it is larger than the sum of its proper divisors (493469913).

1389306903 is an equidigital number, since it uses as much as digits as its factorization.

1389306903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7591905.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 1389306903 is about 37273.4074508892. The cubic root of 1389306903 is about 1115.8335052105.

The spelling of 1389306903 in words is "one billion, three hundred eighty-nine million, three hundred six thousand, nine hundred three".