135720779 has 2 divisors, whose sum is σ = 135720780. Its totient is φ = 135720778.

The previous prime is 135720703. The next prime is 135720787. The reversal of 135720779 is 977027531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135720779 - 2⁸ = 135720523 is a prime.

It is not a weakly prime, because it can be changed into another prime (135720799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67860389 + 67860390.

It is an arithmetic number, because the mean of its divisors is an integer number (67860390).

Almost surely, 2^135720779 is an apocalyptic number.

135720779 is a deficient number, since it is larger than the sum of its proper divisors (1).

135720779 is an equidigital number, since it uses as much as digits as its factorization.

135720779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92610, while the sum is 41.

The square root of 135720779 is about 11649.9261371049. The cubic root of 135720779 is about 513.9041378757.

The spelling of 135720779 in words is "one hundred thirty-five million, seven hundred twenty thousand, seven hundred seventy-nine".