136558979 has 2 divisors, whose sum is σ = 136558980. Its totient is φ = 136558978.

The previous prime is 136558963. The next prime is 136558993. The reversal of 136558979 is 979855631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136558979 - 2⁴ = 136558963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136558979.

It is not a weakly prime, because it can be changed into another prime (136551979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68279489 + 68279490.

It is an arithmetic number, because the mean of its divisors is an integer number (68279490).

Almost surely, 2^136558979 is an apocalyptic number.

136558979 is a deficient number, since it is larger than the sum of its proper divisors (1).

136558979 is an equidigital number, since it uses as much as digits as its factorization.

136558979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 53.

The square root of 136558979 is about 11685.8452411454. The cubic root of 136558979 is about 514.9599101605.

The spelling of 136558979 in words is "one hundred thirty-six million, five hundred fifty-eight thousand, nine hundred seventy-nine".