1386931673 has 2 divisors, whose sum is σ = 1386931674. Its totient is φ = 1386931672.

The previous prime is 1386931639. The next prime is 1386931681. The reversal of 1386931673 is 3761396831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 706921744 + 680009929 = 26588^2 + 26077^2 .

It is a cyclic number.

It is not a de Polignac number, because 1386931673 - 2²⁰ = 1385883097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1386931573) 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, 693465836 + 693465837.

It is an arithmetic number, because the mean of its divisors is an integer number (693465837).

Almost surely, 2^1386931673 is an apocalyptic number.

It is an amenable number.

1386931673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386931673 is an equidigital number, since it uses as much as digits as its factorization.

1386931673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The square root of 1386931673 is about 37241.5315608797. The cubic root of 1386931673 is about 1115.1972471731.

The spelling of 1386931673 in words is "one billion, three hundred eighty-six million, nine hundred thirty-one thousand, six hundred seventy-three".