1386331669 has 2 divisors, whose sum is σ = 1386331670. Its totient is φ = 1386331668.

The previous prime is 1386331621. The next prime is 1386331703. The reversal of 1386331669 is 9661336831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1373814225 + 12517444 = 37065^2 + 3538^2 .

It is a cyclic number.

It is not a de Polignac number, because 1386331669 - 2¹¹ = 1386329621 is a prime.

It is a super-2 number, since 2×1386331669² = 3843830992944651122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1386331069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693165834 + 693165835.

It is an arithmetic number, because the mean of its divisors is an integer number (693165835).

Almost surely, 2^1386331669 is an apocalyptic number.

It is an amenable number.

1386331669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386331669 is an equidigital number, since it uses as much as digits as its factorization.

1386331669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 46.

The square root of 1386331669 is about 37233.4751131290. The cubic root of 1386331669 is about 1115.0364078817.

The spelling of 1386331669 in words is "one billion, three hundred eighty-six million, three hundred thirty-one thousand, six hundred sixty-nine".