136979 has 2 divisors, whose sum is σ = 136980. Its totient is φ = 136978.

The previous prime is 136973. The next prime is 136987. The reversal of 136979 is 979631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136979 - 2⁴ = 136963 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 136979.

It is not a weakly prime, because it can be changed into another prime (136973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68489 + 68490.

It is an arithmetic number, because the mean of its divisors is an integer number (68490).

2¹³⁶⁹⁷⁹ is an apocalyptic number.

136979 is a deficient number, since it is larger than the sum of its proper divisors (1).

136979 is an equidigital number, since it uses as much as digits as its factorization.

136979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 35.

The square root of 136979 is about 370.1067413598. The cubic root of 136979 is about 51.5487332087.

The spelling of 136979 in words is "one hundred thirty-six thousand, nine hundred seventy-nine".