136765439 has 4 divisors (see below), whose sum is σ = 143963640. Its totient is φ = 129567240.

The previous prime is 136765417. The next prime is 136765471. The reversal of 136765439 is 934567631.

It is a happy number.

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 136765439 - 2⁸ = 136765183 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 136765439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136765039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3599072 + ... + 3599109.

It is an arithmetic number, because the mean of its divisors is an integer number (35990910).

Almost surely, 2^136765439 is an apocalyptic number.

136765439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

136765439 is a deficient number, since it is larger than the sum of its proper divisors (7198201).

136765439 is an equidigital number, since it uses as much as digits as its factorization.

136765439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7198200.

The product of its digits is 408240, while the sum is 44.

The square root of 136765439 is about 11694.6756688674. The cubic root of 136765439 is about 515.2192976883.

The spelling of 136765439 in words is "one hundred thirty-six million, seven hundred sixty-five thousand, four hundred thirty-nine".