1388404488197 has 2 divisors, whose sum is σ = 1388404488198. Its totient is φ = 1388404488196.

The previous prime is 1388404488139. The next prime is 1388404488239. The reversal of 1388404488197 is 7918844048831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994565403841 + 393839084356 = 997279^2 + 627566^2 .

It is a cyclic number.

It is not a de Polignac number, because 1388404488197 - 2²⁸ = 1388136052741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1388404484197) 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, 694202244098 + 694202244099.

It is an arithmetic number, because the mean of its divisors is an integer number (694202244099).

Almost surely, 2^{1388404488197} is an apocalyptic number.

It is an amenable number.

1388404488197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388404488197 is an equidigital number, since it uses as much as digits as its factorization.

1388404488197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49545216, while the sum is 65.

The spelling of 1388404488197 in words is "one trillion, three hundred eighty-eight billion, four hundred four million, four hundred eighty-eight thousand, one hundred ninety-seven".