135665087 has 4 divisors (see below), whose sum is σ = 135717120. Its totient is φ = 135613056.

The previous prime is 135665081. The next prime is 135665093. The reversal of 135665087 is 780566531.

135665087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (135665081) and next prime (135665093).

It is a cyclic number.

It is not a de Polignac number, because 135665087 - 2⁴ = 135665071 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 (135665081) 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, 21887 + ... + 27392.

It is an arithmetic number, because the mean of its divisors is an integer number (33929280).

Almost surely, 2^135665087 is an apocalyptic number.

135665087 is a deficient number, since it is larger than the sum of its proper divisors (52033).

135665087 is an equidigital number, since it uses as much as digits as its factorization.

135665087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52032.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 135665087 is about 11647.5356621047. The cubic root of 135665087 is about 513.8338360274.

The spelling of 135665087 in words is "one hundred thirty-five million, six hundred sixty-five thousand, eighty-seven".