135397 has 4 divisors (see below), whose sum is σ = 137376. Its totient is φ = 133420.

The previous prime is 135391. The next prime is 135403. The reversal of 135397 is 793531.

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, and also an emirpimes, since its reverse is a distinct semiprime: 793531 = 509 ⋅1559.

It is an interprime number because it is at equal distance from previous prime (135391) and next prime (135403).

It is a cyclic number.

It is not a de Polignac number, because 135397 - 2³ = 135389 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 883 + ... + 1024.

It is an arithmetic number, because the mean of its divisors is an integer number (34344).

2¹³⁵³⁹⁷ is an apocalyptic number.

It is an amenable number.

135397 is a deficient number, since it is larger than the sum of its proper divisors (1979).

135397 is an equidigital number, since it uses as much as digits as its factorization.

135397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978.

The product of its digits is 2835, while the sum is 28.

The square root of 135397 is about 367.9633133887. The cubic root of 135397 is about 51.3495151473.

The spelling of 135397 in words is "one hundred thirty-five thousand, three hundred ninety-seven".