135780533 has 4 divisors (see below), whose sum is σ = 155177760. Its totient is φ = 116383308.

The previous prime is 135780497. The next prime is 135780551. The reversal of 135780533 is 335087531.

135780533 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, 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 135780533 - 2¹² = 135776437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 135780493 and 135780502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135780833) 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, 9698603 + ... + 9698616.

It is an arithmetic number, because the mean of its divisors is an integer number (38794440).

Almost surely, 2^135780533 is an apocalyptic number.

It is an amenable number.

135780533 is a deficient number, since it is larger than the sum of its proper divisors (19397227).

135780533 is an equidigital number, since it uses as much as digits as its factorization.

135780533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19397226.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 135780533 is about 11652.4904205067. The cubic root of 135780533 is about 513.9795459367.

The spelling of 135780533 in words is "one hundred thirty-five million, seven hundred eighty thousand, five hundred thirty-three".