1369947647281 has 2 divisors, whose sum is σ = 1369947647282. Its totient is φ = 1369947647280.

The previous prime is 1369947647179. The next prime is 1369947647339. The reversal of 1369947647281 is 1827467499631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 812177661681 + 557769985600 = 901209^2 + 746840^2 .

It is an emirp because it is prime and its reverse (1827467499631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1369947647281 - 2²⁵ = 1369914092849 is a prime.

It is a super-2 number, since 2×1369947647281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1369947641281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684973823640 + 684973823641.

It is an arithmetic number, because the mean of its divisors is an integer number (684973823641).

Almost surely, 2^{1369947647281} is an apocalyptic number.

It is an amenable number.

1369947647281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1369947647281 is an equidigital number, since it uses as much as digits as its factorization.

1369947647281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109734912, while the sum is 67.

The spelling of 1369947647281 in words is "one trillion, three hundred sixty-nine billion, nine hundred forty-seven million, six hundred forty-seven thousand, two hundred eighty-one".