135709657 has 8 divisors (see below), whose sum is σ = 144166176. Its totient is φ = 127305792.

The previous prime is 135709643. The next prime is 135709663. The reversal of 135709657 is 756907531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135709657 - 2⁷ = 135709529 is a prime.

It is a super-2 number, since 2×135709657² = 36834222006115298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135719657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7783 + ... + 18220.

It is an arithmetic number, because the mean of its divisors is an integer number (18020772).

Almost surely, 2^135709657 is an apocalyptic number.

135709657 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

135709657 is a deficient number, since it is larger than the sum of its proper divisors (8456519).

135709657 is a wasteful number, since it uses less digits than its factorization.

135709657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26327.

The product of its (nonzero) digits is 198450, while the sum is 43.

The square root of 135709657 is about 11649.4487852430. The cubic root of 135709657 is about 513.8900997453.

The spelling of 135709657 in words is "one hundred thirty-five million, seven hundred nine thousand, six hundred fifty-seven".