135540023 has 2 divisors, whose sum is σ = 135540024. Its totient is φ = 135540022.

The previous prime is 135540019. The next prime is 135540037. The reversal of 135540023 is 320045531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135540023 - 2² = 135540019 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135540323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67770011 + 67770012.

It is an arithmetic number, because the mean of its divisors is an integer number (67770012).

Almost surely, 2^135540023 is an apocalyptic number.

135540023 is a deficient number, since it is larger than the sum of its proper divisors (1).

135540023 is an equidigital number, since it uses as much as digits as its factorization.

135540023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 135540023 is about 11642.1657349481. The cubic root of 135540023 is about 513.6758934712.

Adding to 135540023 its reverse (320045531), we get a palindrome (455585554).

The spelling of 135540023 in words is "one hundred thirty-five million, five hundred forty thousand, twenty-three".