135731785 has 8 divisors (see below), whose sum is σ = 186146496. Its totient is φ = 93073200.

The previous prime is 135731773. The next prime is 135731789. The reversal of 135731785 is 587137531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135731785 - 2⁹ = 135731273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135731789) 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 7 ways as a sum of consecutive naturals, for example, 1938991 + ... + 1939060.

It is an arithmetic number, because the mean of its divisors is an integer number (23268312).

Almost surely, 2^135731785 is an apocalyptic number.

It is an amenable number.

135731785 is a deficient number, since it is larger than the sum of its proper divisors (50414711).

135731785 is an equidigital number, since it uses as much as digits as its factorization.

135731785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878063.

The product of its digits is 88200, while the sum is 40.

The square root of 135731785 is about 11650.3984910388. The cubic root of 135731785 is about 513.9180288365.

The spelling of 135731785 in words is "one hundred thirty-five million, seven hundred thirty-one thousand, seven hundred eighty-five".