135278353 has 4 divisors (see below), whose sum is σ = 154603840. Its totient is φ = 115952868.

The previous prime is 135278323. The next prime is 135278369. The reversal of 135278353 is 353872531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 353872531 = 211 ⋅1677121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135278353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135278303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9662733 + ... + 9662746.

It is an arithmetic number, because the mean of its divisors is an integer number (38650960).

Almost surely, 2^135278353 is an apocalyptic number.

It is an amenable number.

135278353 is a deficient number, since it is larger than the sum of its proper divisors (19325487).

135278353 is an equidigital number, since it uses as much as digits as its factorization.

135278353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19325486.

The product of its digits is 75600, while the sum is 37.

The square root of 135278353 is about 11630.9222764147. The cubic root of 135278353 is about 513.3451174653.

The spelling of 135278353 in words is "one hundred thirty-five million, two hundred seventy-eight thousand, three hundred fifty-three".