1394893289 has 2 divisors, whose sum is σ = 1394893290. Its totient is φ = 1394893288.

The previous prime is 1394893261. The next prime is 1394893327. The reversal of 1394893289 is 9823984931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1029318889 + 365574400 = 32083^2 + 19120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1394893289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1394896289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697446644 + 697446645.

It is an arithmetic number, because the mean of its divisors is an integer number (697446645).

Almost surely, 2^1394893289 is an apocalyptic number.

It is an amenable number.

1394893289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394893289 is an equidigital number, since it uses as much as digits as its factorization.

1394893289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 56.

The square root of 1394893289 is about 37348.2702276826. The cubic root of 1394893289 is about 1117.3270893762.

The spelling of 1394893289 in words is "one billion, three hundred ninety-four million, eight hundred ninety-three thousand, two hundred eighty-nine".