135438493 has 4 divisors (see below), whose sum is σ = 136269568. Its totient is φ = 134607420.

The previous prime is 135438491. The next prime is 135438521. The reversal of 135438493 is 394834531.

It is a happy number.

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 135438493 - 2¹ = 135438491 is a prime.

It is a super-2 number, since 2×135438493² = 36687170772222098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135438491) 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, 415293 + ... + 415618.

It is an arithmetic number, because the mean of its divisors is an integer number (34067392).

Almost surely, 2^135438493 is an apocalyptic number.

It is an amenable number.

135438493 is a deficient number, since it is larger than the sum of its proper divisors (831075).

135438493 is an equidigital number, since it uses as much as digits as its factorization.

135438493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831074.

The product of its digits is 155520, while the sum is 40.

The square root of 135438493 is about 11637.8044750717. The cubic root of 135438493 is about 513.5476003908.

The spelling of 135438493 in words is "one hundred thirty-five million, four hundred thirty-eight thousand, four hundred ninety-three".