136684751 has 4 divisors (see below), whose sum is σ = 156211152. Its totient is φ = 117158352.

The previous prime is 136684741. The next prime is 136684759. The reversal of 136684751 is 157486631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 157486631 = 113 ⋅1393687.

It is a cyclic number.

It is not a de Polignac number, because 136684751 - 2¹⁸ = 136422607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136684699 and 136684708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136684759) 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, 9763190 + ... + 9763203.

It is an arithmetic number, because the mean of its divisors is an integer number (39052788).

Almost surely, 2^136684751 is an apocalyptic number.

136684751 is a deficient number, since it is larger than the sum of its proper divisors (19526401).

136684751 is an equidigital number, since it uses as much as digits as its factorization.

136684751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19526400.

The product of its digits is 120960, while the sum is 41.

The square root of 136684751 is about 11691.2253848773. The cubic root of 136684751 is about 515.1179558260.

The spelling of 136684751 in words is "one hundred thirty-six million, six hundred eighty-four thousand, seven hundred fifty-one".