1389807065 has 4 divisors (see below), whose sum is σ = 1667768484. Its totient is φ = 1111845648.

The previous prime is 1389807059. The next prime is 1389807071. The reversal of 1389807065 is 5607089831.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1389807059) and next prime (1389807071).

It can be written as a sum of positive squares in 2 ways, for example, as 421850521 + 967956544 = 20539^2 + 31112^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389807065 - 2¹² = 1389802969 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, 138980702 + ... + 138980711.

It is an arithmetic number, because the mean of its divisors is an integer number (416942121).

Almost surely, 2^1389807065 is an apocalyptic number.

It is an amenable number.

1389807065 is a deficient number, since it is larger than the sum of its proper divisors (277961419).

1389807065 is an equidigital number, since it uses as much as digits as its factorization.

1389807065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277961418.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 1389807065 is about 37280.1162149476. The cubic root of 1389807065 is about 1115.9673922484.

The spelling of 1389807065 in words is "one billion, three hundred eighty-nine million, eight hundred seven thousand, sixty-five".