1373685541913 has 2 divisors, whose sum is σ = 1373685541914. Its totient is φ = 1373685541912.

The previous prime is 1373685541867. The next prime is 1373685541939. The reversal of 1373685541913 is 3191455863731.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1133219862784 + 240465679129 = 1064528^2 + 490373^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373685541913 - 2³⁰ = 1372611800089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1373685541993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686842770956 + 686842770957.

It is an arithmetic number, because the mean of its divisors is an integer number (686842770957).

Almost surely, 2^{1373685541913} is an apocalyptic number.

It is an amenable number.

1373685541913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373685541913 is an equidigital number, since it uses as much as digits as its factorization.

1373685541913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8164800, while the sum is 56.

The spelling of 1373685541913 in words is "one trillion, three hundred seventy-three billion, six hundred eighty-five million, five hundred forty-one thousand, nine hundred thirteen".