1389723005 has 8 divisors (see below), whose sum is σ = 1819273824. Its totient is φ = 1010707600.

The previous prime is 1389723001. The next prime is 1389723011. The reversal of 1389723005 is 5003279831.

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

It is not a de Polignac number, because 1389723005 - 2² = 1389723001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1389723005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389723001) 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, 12633791 + ... + 12633900.

It is an arithmetic number, because the mean of its divisors is an integer number (227409228).

Almost surely, 2^1389723005 is an apocalyptic number.

It is an amenable number.

1389723005 is a deficient number, since it is larger than the sum of its proper divisors (429550819).

1389723005 is a wasteful number, since it uses less digits than its factorization.

1389723005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25267707.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1389723005 is about 37278.9887872512. The cubic root of 1389723005 is about 1115.9448926960.

The spelling of 1389723005 in words is "one billion, three hundred eighty-nine million, seven hundred twenty-three thousand, five".