1394306689 has 4 divisors (see below), whose sum is σ = 1442386260. Its totient is φ = 1346227120.

The previous prime is 1394306681. The next prime is 1394306701. The reversal of 1394306689 is 9866034931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9866034931 = 16553 ⋅596027.

It can be written as a sum of positive squares in 2 ways, for example, as 559559025 + 834747664 = 23655^2 + 28892^2 .

It is a cyclic number.

It is not a de Polignac number, because 1394306689 - 2³ = 1394306681 is a prime.

It is a super-2 number, since 2×1394306689² = 3888182285980285442, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1394306681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24039742 + ... + 24039799.

It is an arithmetic number, because the mean of its divisors is an integer number (360596565).

Almost surely, 2^1394306689 is an apocalyptic number.

It is an amenable number.

1394306689 is a deficient number, since it is larger than the sum of its proper divisors (48079571).

1394306689 is an equidigital number, since it uses as much as digits as its factorization.

1394306689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48079570.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 1394306689 is about 37340.4162938765. The cubic root of 1394306689 is about 1117.1704427535.

The spelling of 1394306689 in words is "one billion, three hundred ninety-four million, three hundred six thousand, six hundred eighty-nine".