1394798409 has 27 divisors (see below), whose sum is σ = 2059194189. Its totient is φ = 909772920.

The previous prime is 1394798401. The next prime is 1394798441. The reversal of 1394798409 is 9048974931.

The square root of 1394798409 is 37347.

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

1394798409 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1394798409 - 2³ = 1394798401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1394798401) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6610314 + ... + 6610524.

Almost surely, 2^1394798409 is an apocalyptic number.

1394798409 is the 37347-th square number.

1394798409 is the 18674-th centered octagonal number.

It is an amenable number.

1394798409 is a deficient number, since it is larger than the sum of its proper divisors (664395780).

1394798409 is an frugal number, since it uses more digits than its factorization.

1394798409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The cubic root of 1394798409 is about 1117.3017554435.

The spelling of 1394798409 in words is "one billion, three hundred ninety-four million, seven hundred ninety-eight thousand, four hundred nine".