135517657 has 4 divisors (see below), whose sum is σ = 147837456. Its totient is φ = 123197860.

The previous prime is 135517637. The next prime is 135517673. The reversal of 135517657 is 756715531.

135517657 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, 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-135517657 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135517637) 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, 6159883 + ... + 6159904.

It is an arithmetic number, because the mean of its divisors is an integer number (36959364).

Almost surely, 2^135517657 is an apocalyptic number.

It is an amenable number.

135517657 is a deficient number, since it is larger than the sum of its proper divisors (12319799).

135517657 is a wasteful number, since it uses less digits than its factorization.

135517657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12319798.

The product of its digits is 110250, while the sum is 40.

The square root of 135517657 is about 11641.2051352083. The cubic root of 135517657 is about 513.6476373474.

The spelling of 135517657 in words is "one hundred thirty-five million, five hundred seventeen thousand, six hundred fifty-seven".