136977605 has 4 divisors (see below), whose sum is σ = 164373132. Its totient is φ = 109582080.

The previous prime is 136977601. The next prime is 136977611. The reversal of 136977605 is 506779631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31114084 + 105863521 = 5578^2 + 10289^2 .

It is not a de Polignac number, because 136977605 - 2² = 136977601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136977601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13697756 + ... + 13697765.

It is an arithmetic number, because the mean of its divisors is an integer number (41093283).

Almost surely, 2^136977605 is an apocalyptic number.

It is an amenable number.

136977605 is a deficient number, since it is larger than the sum of its proper divisors (27395527).

136977605 is an equidigital number, since it uses as much as digits as its factorization.

136977605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27395526.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 136977605 is about 11703.7432046333. The cubic root of 136977605 is about 515.4855821660.

The spelling of 136977605 in words is "one hundred thirty-six million, nine hundred seventy-seven thousand, six hundred five".