135784281373 has 8 divisors (see below), whose sum is σ = 154830945528. Its totient is φ = 117966434304.

The previous prime is 135784281331. The next prime is 135784281389. The reversal of 135784281373 is 373182487531.

It can be written as a sum of positive squares in 4 ways, for example, as 9995600484 + 125788680889 = 99978^2 + 354667^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135784281373 - 2⁹ = 135784280861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135784281373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135784281673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307204036 + ... + 307204477.

It is an arithmetic number, because the mean of its divisors is an integer number (19353868191).

Almost surely, 2^135784281373 is an apocalyptic number.

135784281373 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

135784281373 is a deficient number, since it is larger than the sum of its proper divisors (19046664155).

135784281373 is a wasteful number, since it uses less digits than its factorization.

135784281373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614408543.

The product of its digits is 3386880, while the sum is 52.

The spelling of 135784281373 in words is "one hundred thirty-five billion, seven hundred eighty-four million, two hundred eighty-one thousand, three hundred seventy-three".