1897378406713 has 2 divisors, whose sum is σ = 1897378406714. Its totient is φ = 1897378406712.

The previous prime is 1897378406711. The next prime is 1897378406741. The reversal of 1897378406713 is 3176048737981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1776014659584 + 121363747129 = 1332672^2 + 348373^2 .

It is a cyclic number.

It is not a de Polignac number, because 1897378406713 - 2¹ = 1897378406711 is a prime.

Together with 1897378406711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1897378406711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948689203356 + 948689203357.

It is an arithmetic number, because the mean of its divisors is an integer number (948689203357).

Almost surely, 2^{1897378406713} is an apocalyptic number.

It is an amenable number.

1897378406713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1897378406713 is an equidigital number, since it uses as much as digits as its factorization.

1897378406713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42674688, while the sum is 64.

The spelling of 1897378406713 in words is "one trillion, eight hundred ninety-seven billion, three hundred seventy-eight million, four hundred six thousand, seven hundred thirteen".