135656677 has 4 divisors (see below), whose sum is σ = 146091820. Its totient is φ = 125221536.

The previous prime is 135656669. The next prime is 135656681. The reversal of 135656677 is 776656531.

135656677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 6584356 + 129072321 = 2566^2 + 11361^2 .

It is a cyclic number.

It is not a de Polignac number, because 135656677 - 2³ = 135656669 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 (135656687) 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, 5217552 + ... + 5217577.

It is an arithmetic number, because the mean of its divisors is an integer number (36522955).

Almost surely, 2^135656677 is an apocalyptic number.

It is an amenable number.

135656677 is a deficient number, since it is larger than the sum of its proper divisors (10435143).

135656677 is a wasteful number, since it uses less digits than its factorization.

135656677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10435142.

The product of its digits is 793800, while the sum is 46.

The square root of 135656677 is about 11647.1746359364. The cubic root of 135656677 is about 513.8232181350.

The spelling of 135656677 in words is "one hundred thirty-five million, six hundred fifty-six thousand, six hundred seventy-seven".