135138319 has 4 divisors (see below), whose sum is σ = 138790744. Its totient is φ = 131485896.

The previous prime is 135138299. The next prime is 135138323. The reversal of 135138319 is 913831531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 913831531 = 157 ⋅5820583.

It is a cyclic number.

It is not a de Polignac number, because 135138319 - 2⁷ = 135138191 is a prime.

It is a super-2 number, since 2×135138319² = 36524730524291522, 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 (135138329) 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, 1826157 + ... + 1826230.

It is an arithmetic number, because the mean of its divisors is an integer number (34697686).

Almost surely, 2^135138319 is an apocalyptic number.

135138319 is a deficient number, since it is larger than the sum of its proper divisors (3652425).

135138319 is an equidigital number, since it uses as much as digits as its factorization.

135138319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652424.

The product of its digits is 9720, while the sum is 34.

The square root of 135138319 is about 11624.9008167812. The cubic root of 135138319 is about 513.1679258029.

The spelling of 135138319 in words is "one hundred thirty-five million, one hundred thirty-eight thousand, three hundred nineteen".