135579979 has 2 divisors, whose sum is σ = 135579980. Its totient is φ = 135579978.

The previous prime is 135579911. The next prime is 135580043. The reversal of 135579979 is 979975531.

It is a strong prime.

It is an emirp because it is prime and its reverse (979975531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135579979 - 2⁹ = 135579467 is a prime.

It is not a weakly prime, because it can be changed into another prime (135579179) 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 as a sum of consecutive naturals, namely, 67789989 + 67789990.

It is an arithmetic number, because the mean of its divisors is an integer number (67789990).

Almost surely, 2^135579979 is an apocalyptic number.

135579979 is a deficient number, since it is larger than the sum of its proper divisors (1).

135579979 is an equidigital number, since it uses as much as digits as its factorization.

135579979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2679075, while the sum is 55.

The square root of 135579979 is about 11643.8816122460. The cubic root of 135579979 is about 513.7263642155.

The spelling of 135579979 in words is "one hundred thirty-five million, five hundred seventy-nine thousand, nine hundred seventy-nine".