136069979 has 4 divisors (see below), whose sum is σ = 139747584. Its totient is φ = 132392376.

The previous prime is 136069957. The next prime is 136069987. The reversal of 136069979 is 979960631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136069979 - 2⁸ = 136069723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136069919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1838747 + ... + 1838820.

It is an arithmetic number, because the mean of its divisors is an integer number (34936896).

Almost surely, 2^136069979 is an apocalyptic number.

136069979 is a deficient number, since it is larger than the sum of its proper divisors (3677605).

136069979 is an equidigital number, since it uses as much as digits as its factorization.

136069979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677604.

The product of its (nonzero) digits is 551124, while the sum is 50.

The square root of 136069979 is about 11664.9037287069. The cubic root of 136069979 is about 514.3445067891.

The spelling of 136069979 in words is "one hundred thirty-six million, sixty-nine thousand, nine hundred seventy-nine".