394048719289 has 3 divisors (see below), whose sum is σ = 394049347023. Its totient is φ = 394048091556.

The previous prime is 394048719257. The next prime is 394048719313. The reversal of 394048719289 is 982917840493.

The square root of 394048719289 is 627733.

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 can be written as a sum of positive squares in only one way, i.e., 284680938025 + 109367781264 = 533555^2 + 330708^2 .

It is not a de Polignac number, because 394048719289 - 2⁵ = 394048719257 is a prime.

It is a super-2 number, since 2×394048719289² (a number of 24 digits) contains 22 as substring.

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 394048719289.

It is not an unprimeable number, because it can be changed into a prime (394048717289) 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, 313867 + ... + 941599.

It is an arithmetic number, because the mean of its divisors is an integer number (131349782341).

Almost surely, 2^394048719289 is an apocalyptic number.

394048719289 is the 627733-rd square number.

394048719289 is the 313867-th centered octagonal number.

It is an amenable number.

394048719289 is a deficient number, since it is larger than the sum of its proper divisors (627734).

394048719289 is an frugal number, since it uses more digits than its factorization.

394048719289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255466 (or 627733 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 64.

Multiplying 394048719289 by its sum of digits (64), we get a square (25219118034496 = 5021864²).

The spelling of 394048719289 in words is "three hundred ninety-four billion, forty-eight million, seven hundred nineteen thousand, two hundred eighty-nine".