136804751 has 4 divisors (see below), whose sum is σ = 136882104. Its totient is φ = 136727400.

The previous prime is 136804721. The next prime is 136804777. The reversal of 136804751 is 157408631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 157408631 = 1951 ⋅80681.

It is a cyclic number.

It is not a de Polignac number, because 136804751 - 2¹⁰ = 136803727 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 (136804711) 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, 35960 + ... + 39581.

It is an arithmetic number, because the mean of its divisors is an integer number (34220526).

Almost surely, 2^136804751 is an apocalyptic number.

136804751 is a deficient number, since it is larger than the sum of its proper divisors (77353).

136804751 is an equidigital number, since it uses as much as digits as its factorization.

136804751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77352.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 136804751 is about 11696.3563129720. The cubic root of 136804751 is about 515.2686580161.

The spelling of 136804751 in words is "one hundred thirty-six million, eight hundred four thousand, seven hundred fifty-one".