135828779 has 4 divisors (see below), whose sum is σ = 140512560. Its totient is φ = 131145000.

The previous prime is 135828769. The next prime is 135828811. The reversal of 135828779 is 977828531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977828531 = 1987 ⋅492113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135828779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135828769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2341847 + ... + 2341904.

It is an arithmetic number, because the mean of its divisors is an integer number (35128140).

Almost surely, 2^135828779 is an apocalyptic number.

135828779 is a deficient number, since it is larger than the sum of its proper divisors (4683781).

135828779 is an equidigital number, since it uses as much as digits as its factorization.

135828779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683780.

The product of its digits is 846720, while the sum is 50.

The square root of 135828779 is about 11654.5604378715. The cubic root of 135828779 is about 514.0404150470.

The spelling of 135828779 in words is "one hundred thirty-five million, eight hundred twenty-eight thousand, seven hundred seventy-nine".