136651679 has 4 divisors (see below), whose sum is σ = 137196360. Its totient is φ = 136107000.

The previous prime is 136651663. The next prime is 136651681. The reversal of 136651679 is 976156631.

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 136651679 - 2⁴ = 136651663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136651639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271964 + ... + 272465.

It is an arithmetic number, because the mean of its divisors is an integer number (34299090).

Almost surely, 2^136651679 is an apocalyptic number.

136651679 is a deficient number, since it is larger than the sum of its proper divisors (544681).

136651679 is an equidigital number, since it uses as much as digits as its factorization.

136651679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544680.

The product of its digits is 204120, while the sum is 44.

The square root of 136651679 is about 11689.8109052285. The cubic root of 136651679 is about 515.0764067991.

The spelling of 136651679 in words is "one hundred thirty-six million, six hundred fifty-one thousand, six hundred seventy-nine".