135563869 has 4 divisors (see below), whose sum is σ = 154930144. Its totient is φ = 116197596.

The previous prime is 135563867. The next prime is 135563881. The reversal of 135563869 is 968365531.

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 not a de Polignac number, because 135563869 - 2¹ = 135563867 is a prime.

It is a super-2 number, since 2×135563869² = 36755125156498322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135563867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9683127 + ... + 9683140.

It is an arithmetic number, because the mean of its divisors is an integer number (38732536).

Almost surely, 2^135563869 is an apocalyptic number.

It is an amenable number.

135563869 is a deficient number, since it is larger than the sum of its proper divisors (19366275).

135563869 is an equidigital number, since it uses as much as digits as its factorization.

135563869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19366274.

The product of its digits is 583200, while the sum is 46.

The square root of 135563869 is about 11643.1898120747. The cubic root of 135563869 is about 513.7060159320.

The spelling of 135563869 in words is "one hundred thirty-five million, five hundred sixty-three thousand, eight hundred sixty-nine".