135523073 has 8 divisors (see below), whose sum is σ = 158044800. Its totient is φ = 116162340.

The previous prime is 135523051. The next prime is 135523123. The reversal of 135523073 is 370325531.

It is not a de Polignac number, because 135523073 - 2⁸ = 135522817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135525073) 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, 197213 + ... + 197898.

It is an arithmetic number, because the mean of its divisors is an integer number (19755600).

Almost surely, 2^135523073 is an apocalyptic number.

It is an amenable number.

135523073 is a deficient number, since it is larger than the sum of its proper divisors (22521727).

135523073 is an frugal number, since it uses more digits than its factorization.

135523073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395132 (or 395118 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 29.

The square root of 135523073 is about 11641.4377548480. The cubic root of 135523073 is about 513.6544799454.

The spelling of 135523073 in words is "one hundred thirty-five million, five hundred twenty-three thousand, seventy-three".