135507979 has 2 divisors, whose sum is σ = 135507980. Its totient is φ = 135507978.

The previous prime is 135507971. The next prime is 135508001. The reversal of 135507979 is 979705531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135507979 - 2³ = 135507971 is a prime.

It is not a weakly prime, because it can be changed into another prime (135507971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67753989 + 67753990.

It is an arithmetic number, because the mean of its divisors is an integer number (67753990).

Almost surely, 2^135507979 is an apocalyptic number.

135507979 is a deficient number, since it is larger than the sum of its proper divisors (1).

135507979 is an equidigital number, since it uses as much as digits as its factorization.

135507979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 297675, while the sum is 46.

The square root of 135507979 is about 11640.7894491740. The cubic root of 135507979 is about 513.6354096661.

The spelling of 135507979 in words is "one hundred thirty-five million, five hundred seven thousand, nine hundred seventy-nine".