135641917 has 4 divisors (see below), whose sum is σ = 136474240. Its totient is φ = 134809596.

The previous prime is 135641911. The next prime is 135641921. The reversal of 135641917 is 719146531.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 719146531 = 5477 ⋅131303.

It is a cyclic number.

It is not a de Polignac number, because 135641917 - 2¹⁹ = 135117629 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 (135641911) 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, 415917 + ... + 416242.

It is an arithmetic number, because the mean of its divisors is an integer number (34118560).

Almost surely, 2^135641917 is an apocalyptic number.

It is an amenable number.

135641917 is a deficient number, since it is larger than the sum of its proper divisors (832323).

135641917 is an equidigital number, since it uses as much as digits as its factorization.

135641917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832322.

The product of its digits is 22680, while the sum is 37.

The square root of 135641917 is about 11646.5409886369. The cubic root of 135641917 is about 513.8045821049.

The spelling of 135641917 in words is "one hundred thirty-five million, six hundred forty-one thousand, nine hundred seventeen".