135530023 has 4 divisors (see below), whose sum is σ = 138681928. Its totient is φ = 132378120.

The previous prime is 135529993. The next prime is 135530041. The reversal of 135530023 is 320035531.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 135530023 - 2¹³ = 135521831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135529976 and 135530003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135540023) 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, 1575888 + ... + 1575973.

It is an arithmetic number, because the mean of its divisors is an integer number (34670482).

Almost surely, 2^135530023 is an apocalyptic number.

135530023 is a deficient number, since it is larger than the sum of its proper divisors (3151905).

135530023 is an equidigital number, since it uses as much as digits as its factorization.

135530023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3151904.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 135530023 is about 11641.7362536694. The cubic root of 135530023 is about 513.6632603386.

Adding to 135530023 its reverse (320035531), we get a palindrome (455565554).

The spelling of 135530023 in words is "one hundred thirty-five million, five hundred thirty thousand, twenty-three".