135174993 has 4 divisors (see below), whose sum is σ = 180233328. Its totient is φ = 90116660.

The previous prime is 135174989. The next prime is 135175009. The reversal of 135174993 is 399471531.

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 135174993 - 2² = 135174989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135174913) 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, 22529163 + ... + 22529168.

It is an arithmetic number, because the mean of its divisors is an integer number (45058332).

Almost surely, 2^135174993 is an apocalyptic number.

It is an amenable number.

135174993 is a deficient number, since it is larger than the sum of its proper divisors (45058335).

135174993 is an equidigital number, since it uses as much as digits as its factorization.

135174993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45058334.

The product of its digits is 102060, while the sum is 42.

The square root of 135174993 is about 11626.4780995794. The cubic root of 135174993 is about 513.2143429811.

The spelling of 135174993 in words is "one hundred thirty-five million, one hundred seventy-four thousand, nine hundred ninety-three".