1381359671977 has 2 divisors, whose sum is σ = 1381359671978. Its totient is φ = 1381359671976.

The previous prime is 1381359671969. The next prime is 1381359672037. The reversal of 1381359671977 is 7791769531831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1041877484176 + 339482187801 = 1020724^2 + 582651^2 .

It is an emirp because it is prime and its reverse (7791769531831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1381359671977 - 2³ = 1381359671969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1381359675977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690679835988 + 690679835989.

It is an arithmetic number, because the mean of its divisors is an integer number (690679835989).

Almost surely, 2^{1381359671977} is an apocalyptic number.

It is an amenable number.

1381359671977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381359671977 is an equidigital number, since it uses as much as digits as its factorization.

1381359671977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60011280, while the sum is 67.

The spelling of 1381359671977 in words is "one trillion, three hundred eighty-one billion, three hundred fifty-nine million, six hundred seventy-one thousand, nine hundred seventy-seven".