1386606673 has 2 divisors, whose sum is σ = 1386606674. Its totient is φ = 1386606672.

The previous prime is 1386606653. The next prime is 1386606691. The reversal of 1386606673 is 3766066831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1370702529 + 15904144 = 37023^2 + 3988^2 .

It is a cyclic number.

It is not a de Polignac number, because 1386606673 - 2²⁵ = 1353052241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1386606623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693303336 + 693303337.

It is an arithmetic number, because the mean of its divisors is an integer number (693303337).

Almost surely, 2^1386606673 is an apocalyptic number.

It is an amenable number.

1386606673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386606673 is an equidigital number, since it uses as much as digits as its factorization.

1386606673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 46.

The square root of 1386606673 is about 37237.1678971428. The cubic root of 1386606673 is about 1115.1101322305.

The spelling of 1386606673 in words is "one billion, three hundred eighty-six million, six hundred six thousand, six hundred seventy-three".