1394039789 has 2 divisors, whose sum is σ = 1394039790. Its totient is φ = 1394039788.

The previous prime is 1394039753. The next prime is 1394039809. The reversal of 1394039789 is 9879304931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 995718025 + 398321764 = 31555^2 + 19958^2 .

It is a cyclic number.

It is not a de Polignac number, because 1394039789 - 2⁸ = 1394039533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1394039789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1394035789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697019894 + 697019895.

It is an arithmetic number, because the mean of its divisors is an integer number (697019895).

Almost surely, 2^1394039789 is an apocalyptic number.

It is an amenable number.

1394039789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394039789 is an equidigital number, since it uses as much as digits as its factorization.

1394039789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 1394039789 is about 37336.8422473031. The cubic root of 1394039789 is about 1117.0991547982.

The spelling of 1394039789 in words is "one billion, three hundred ninety-four million, thirty-nine thousand, seven hundred eighty-nine".