135740657 has 4 divisors (see below), whose sum is σ = 146182260. Its totient is φ = 125299056.

The previous prime is 135740611. The next prime is 135740663. The reversal of 135740657 is 756047531.

135740657 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 63218401 + 72522256 = 7951^2 + 8516^2 .

It is a cyclic number.

It is not a de Polignac number, because 135740657 - 2⁸ = 135740401 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 135740657.

It is not an unprimeable number, because it can be changed into a prime (135740557) 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, 5220782 + ... + 5220807.

It is an arithmetic number, because the mean of its divisors is an integer number (36545565).

Almost surely, 2^135740657 is an apocalyptic number.

It is an amenable number.

135740657 is a deficient number, since it is larger than the sum of its proper divisors (10441603).

135740657 is a wasteful number, since it uses less digits than its factorization.

135740657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10441602.

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 135740657 is about 11650.7792443252. The cubic root of 135740657 is about 513.9292258734.

The spelling of 135740657 in words is "one hundred thirty-five million, seven hundred forty thousand, six hundred fifty-seven".