135779122469 has 2 divisors, whose sum is σ = 135779122470. Its totient is φ = 135779122468.

The previous prime is 135779122439. The next prime is 135779122511. The reversal of 135779122469 is 964221977531.

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., 97633126369 + 38145996100 = 312463^2 + 195310^2 .

It is an emirp because it is prime and its reverse (964221977531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135779122469 is a prime.

It is a super-2 number, since 2×135779122469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135779122439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67889561234 + 67889561235.

It is an arithmetic number, because the mean of its divisors is an integer number (67889561235).

Almost surely, 2^135779122469 is an apocalyptic number.

It is an amenable number.

135779122469 is a deficient number, since it is larger than the sum of its proper divisors (1).

135779122469 is an equidigital number, since it uses as much as digits as its factorization.

135779122469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 56.

The spelling of 135779122469 in words is "one hundred thirty-five billion, seven hundred seventy-nine million, one hundred twenty-two thousand, four hundred sixty-nine".