135673423 has 4 divisors (see below), whose sum is σ = 136282048. Its totient is φ = 135064800.

The previous prime is 135673411. The next prime is 135673427. The reversal of 135673423 is 324376531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324376531 = 19 ⋅17072449.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135673423 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 (135673427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303978 + ... + 304423.

It is an arithmetic number, because the mean of its divisors is an integer number (34070512).

Almost surely, 2^135673423 is an apocalyptic number.

135673423 is a deficient number, since it is larger than the sum of its proper divisors (608625).

135673423 is an equidigital number, since it uses as much as digits as its factorization.

135673423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608624.

The product of its digits is 45360, while the sum is 34.

The square root of 135673423 is about 11647.8935005433. The cubic root of 135673423 is about 513.8443600593.

The spelling of 135673423 in words is "one hundred thirty-five million, six hundred seventy-three thousand, four hundred twenty-three".