135723287 has 12 divisors (see below), whose sum is σ = 158133960. Its totient is φ = 116148816.

The previous prime is 135723241. The next prime is 135723293. The reversal of 135723287 is 782327531.

135723287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135723287 - 2²⁴ = 118946071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135723287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135723227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35264 + ... + 38922.

It is an arithmetic number, because the mean of its divisors is an integer number (13177830).

Almost surely, 2^135723287 is an apocalyptic number.

135723287 is a deficient number, since it is larger than the sum of its proper divisors (22410673).

135723287 is an equidigital number, since it uses as much as digits as its factorization.

135723287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430 (or 4423 counting only the distinct ones).

The product of its digits is 70560, while the sum is 38.

The square root of 135723287 is about 11650.0337767751. The cubic root of 135723287 is about 513.9073033542.

The spelling of 135723287 in words is "one hundred thirty-five million, seven hundred twenty-three thousand, two hundred eighty-seven".