136738777 has 4 divisors (see below), whose sum is σ = 156272896. Its totient is φ = 117204660.

The previous prime is 136738751. The next prime is 136738807. The reversal of 136738777 is 777837631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136738777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136738777.

It is not an unprimeable number, because it can be changed into a prime (136738727) 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, 9767049 + ... + 9767062.

It is an arithmetic number, because the mean of its divisors is an integer number (39068224).

Almost surely, 2^136738777 is an apocalyptic number.

It is an amenable number.

136738777 is a deficient number, since it is larger than the sum of its proper divisors (19534119).

136738777 is an equidigital number, since it uses as much as digits as its factorization.

136738777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19534118.

The product of its digits is 1037232, while the sum is 49.

The square root of 136738777 is about 11693.5356928518. The cubic root of 136738777 is about 515.1858153754.

The spelling of 136738777 in words is "one hundred thirty-six million, seven hundred thirty-eight thousand, seven hundred seventy-seven".