135528779 has 2 divisors, whose sum is σ = 135528780. Its totient is φ = 135528778.

The previous prime is 135528749. The next prime is 135528781. The reversal of 135528779 is 977825531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135528779 is a prime.

Together with 135528781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135528749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67764389 + 67764390.

It is an arithmetic number, because the mean of its divisors is an integer number (67764390).

Almost surely, 2^135528779 is an apocalyptic number.

135528779 is a deficient number, since it is larger than the sum of its proper divisors (1).

135528779 is an equidigital number, since it uses as much as digits as its factorization.

135528779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 47.

The square root of 135528779 is about 11641.6828250902. The cubic root of 135528779 is about 513.6616887334.

The spelling of 135528779 in words is "one hundred thirty-five million, five hundred twenty-eight thousand, seven hundred seventy-nine".