1389108405197 has 2 divisors, whose sum is σ = 1389108405198. Its totient is φ = 1389108405196.

The previous prime is 1389108405173. The next prime is 1389108405233. The reversal of 1389108405197 is 7915048019831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 856404027241 + 532704377956 = 925421^2 + 729866^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1389108405197 is a prime.

It is a super-2 number, since 2×1389108405197² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389108455197) 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, 694554202598 + 694554202599.

It is an arithmetic number, because the mean of its divisors is an integer number (694554202599).

Almost surely, 2^{1389108405197} is an apocalyptic number.

It is an amenable number.

1389108405197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389108405197 is an equidigital number, since it uses as much as digits as its factorization.

1389108405197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 1389108405197 in words is "one trillion, three hundred eighty-nine billion, one hundred eight million, four hundred five thousand, one hundred ninety-seven".