135517897 has 16 divisors (see below), whose sum is σ = 148547520. Its totient is φ = 123121152.

The previous prime is 135517883. The next prime is 135517919. The reversal of 135517897 is 798715531.

It is a cyclic number.

It is not a de Polignac number, because 135517897 - 2¹⁹ = 134993609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135517807) 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 15 ways as a sum of consecutive naturals, for example, 64018 + ... + 66100.

It is an arithmetic number, because the mean of its divisors is an integer number (9284220).

Almost surely, 2^135517897 is an apocalyptic number.

135517897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

135517897 is a deficient number, since it is larger than the sum of its proper divisors (13029623).

135517897 is a wasteful number, since it uses less digits than its factorization.

135517897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232.

The product of its digits is 264600, while the sum is 46.

The square root of 135517897 is about 11641.2154434148. The cubic root of 135517897 is about 513.6479405683.

The spelling of 135517897 in words is "one hundred thirty-five million, five hundred seventeen thousand, eight hundred ninety-seven".