1389585723 has 8 divisors (see below), whose sum is σ = 1858701648. Its totient is φ = 923430144.

The previous prime is 1389585707. The next prime is 1389585739. The reversal of 1389585723 is 3275859831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1389585707) and next prime (1389585739).

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

It is not a de Polignac number, because 1389585723 - 2⁴ = 1389585707 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1389585773) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 738990 + ... + 740867.

It is an arithmetic number, because the mean of its divisors is an integer number (232337706).

Almost surely, 2^1389585723 is an apocalyptic number.

1389585723 is a deficient number, since it is larger than the sum of its proper divisors (469115925).

1389585723 is a wasteful number, since it uses less digits than its factorization.

1389585723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480173.

The product of its digits is 1814400, while the sum is 51.

The square root of 1389585723 is about 37277.1474632918. The cubic root of 1389585723 is about 1115.9081457589.

The spelling of 1389585723 in words is "one billion, three hundred eighty-nine million, five hundred eighty-five thousand, seven hundred twenty-three".