135634859 has 4 divisors (see below), whose sum is σ = 139300704. Its totient is φ = 131969016.

The previous prime is 135634853. The next prime is 135634861. The reversal of 135634859 is 958436531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958436531 = 13 ⋅73725887.

It is a cyclic number.

It is not a de Polignac number, because 135634859 - 2¹⁶ = 135569323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135634853) 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, 1832867 + ... + 1832940.

It is an arithmetic number, because the mean of its divisors is an integer number (34825176).

Almost surely, 2^135634859 is an apocalyptic number.

135634859 is a deficient number, since it is larger than the sum of its proper divisors (3665845).

135634859 is an equidigital number, since it uses as much as digits as its factorization.

135634859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3665844.

The product of its digits is 388800, while the sum is 44.

The square root of 135634859 is about 11646.2379762737. The cubic root of 135634859 is about 513.7956701704.

The spelling of 135634859 in words is "one hundred thirty-five million, six hundred thirty-four thousand, eight hundred fifty-nine".