135387317 has 4 divisors (see below), whose sum is σ = 145801740. Its totient is φ = 124972896.

The previous prime is 135387313. The next prime is 135387347. The reversal of 135387317 is 713783531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 713783531 = 43 ⋅16599617.

It can be written as a sum of positive squares in 2 ways, for example, as 75881521 + 59505796 = 8711^2 + 7714^2 .

It is a cyclic number.

It is not a de Polignac number, because 135387317 - 2² = 135387313 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 (135387313) 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, 5207192 + ... + 5207217.

It is an arithmetic number, because the mean of its divisors is an integer number (36450435).

Almost surely, 2^135387317 is an apocalyptic number.

It is an amenable number.

135387317 is a deficient number, since it is larger than the sum of its proper divisors (10414423).

135387317 is a wasteful number, since it uses less digits than its factorization.

135387317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10414422.

The product of its digits is 52920, while the sum is 38.

The square root of 135387317 is about 11635.6055708330. The cubic root of 135387317 is about 513.4829102074.

The spelling of 135387317 in words is "one hundred thirty-five million, three hundred eighty-seven thousand, three hundred seventeen".