1392038943409 has 3 divisors (see below), whose sum is σ = 1392040123257. Its totient is φ = 1392037763562.

The previous prime is 1392038943397. The next prime is 1392038943443. The reversal of 1392038943409 is 9043498302931.

The square root of 1392038943409 is 1179847.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1392038943409 - 2¹⁵ = 1392038910641 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 1392038943409.

It is not an unprimeable number, because it can be changed into a prime (1392038923409) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 589924 + ... + 1769770.

It is an arithmetic number, because the mean of its divisors is an integer number (464013374419).

Almost surely, 2^{1392038943409} is an apocalyptic number.

1392038943409 is the 1179847-th square number.

1392038943409 is the 589924-th centered octagonal number.

It is an amenable number.

1392038943409 is a deficient number, since it is larger than the sum of its proper divisors (1179848).

1392038943409 is an frugal number, since it uses more digits than its factorization.

1392038943409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359694 (or 1179847 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 55.

The spelling of 1392038943409 in words is "one trillion, three hundred ninety-two billion, thirty-eight million, nine hundred forty-three thousand, four hundred nine".