1243474654769 has 2 divisors, whose sum is σ = 1243474654770. Its totient is φ = 1243474654768.

The previous prime is 1243474654711. The next prime is 1243474654783. The reversal of 1243474654769 is 9674564743421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 822939265600 + 420535389169 = 907160^2 + 648487^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243474654769 - 2²⁴ = 1243457877553 is a prime.

It is a super-2 number, since 2×1243474654769² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1243474654369) 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, 621737327384 + 621737327385.

It is an arithmetic number, because the mean of its divisors is an integer number (621737327385).

Almost surely, 2^{1243474654769} is an apocalyptic number.

It is an amenable number.

1243474654769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243474654769 is an equidigital number, since it uses as much as digits as its factorization.

1243474654769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121927680, while the sum is 62.

The spelling of 1243474654769 in words is "one trillion, two hundred forty-three billion, four hundred seventy-four million, six hundred fifty-four thousand, seven hundred sixty-nine".