1389158065 has 4 divisors (see below), whose sum is σ = 1666989684. Its totient is φ = 1111326448.

The previous prime is 1389158027. The next prime is 1389158093. The reversal of 1389158065 is 5608519831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 364389921 + 1024768144 = 19089^2 + 32012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1389158065 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 3 ways as a sum of consecutive naturals, for example, 138915802 + ... + 138915811.

It is an arithmetic number, because the mean of its divisors is an integer number (416747421).

Almost surely, 2^1389158065 is an apocalyptic number.

It is an amenable number.

1389158065 is a deficient number, since it is larger than the sum of its proper divisors (277831619).

1389158065 is an equidigital number, since it uses as much as digits as its factorization.

1389158065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277831618.

The product of its (nonzero) digits is 259200, while the sum is 46.

The square root of 1389158065 is about 37271.4108265303. The cubic root of 1389158065 is about 1115.7936569576.

The spelling of 1389158065 in words is "one billion, three hundred eighty-nine million, one hundred fifty-eight thousand, sixty-five".