1386934709 has 2 divisors, whose sum is σ = 1386934710. Its totient is φ = 1386934708.

The previous prime is 1386934691. The next prime is 1386934723. The reversal of 1386934709 is 9074396831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1100580625 + 286354084 = 33175^2 + 16922^2 .

It is a cyclic number.

It is not a de Polignac number, because 1386934709 - 2⁸ = 1386934453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1386934739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693467354 + 693467355.

It is an arithmetic number, because the mean of its divisors is an integer number (693467355).

Almost surely, 2^1386934709 is an apocalyptic number.

It is an amenable number.

1386934709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386934709 is an equidigital number, since it uses as much as digits as its factorization.

1386934709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 1386934709 is about 37241.5723218019. The cubic root of 1386934709 is about 1115.1980608965.

The spelling of 1386934709 in words is "one billion, three hundred eighty-six million, nine hundred thirty-four thousand, seven hundred nine".