135321317 has 2 divisors, whose sum is σ = 135321318. Its totient is φ = 135321316.

The previous prime is 135321313. The next prime is 135321409. The reversal of 135321317 is 713123531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82337476 + 52983841 = 9074^2 + 7279^2 .

It is a cyclic number.

It is not a de Polignac number, because 135321317 - 2² = 135321313 is a prime.

It is a super-2 number, since 2×135321317² = 36623717669228978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135321313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67660658 + 67660659.

It is an arithmetic number, because the mean of its divisors is an integer number (67660659).

Almost surely, 2^135321317 is an apocalyptic number.

It is an amenable number.

135321317 is a deficient number, since it is larger than the sum of its proper divisors (1).

135321317 is an equidigital number, since it uses as much as digits as its factorization.

135321317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 26.

The square root of 135321317 is about 11632.7691028405. The cubic root of 135321317 is about 513.3994573372.

Adding to 135321317 its reverse (713123531), we get a palindrome (848444848).

The spelling of 135321317 in words is "one hundred thirty-five million, three hundred twenty-one thousand, three hundred seventeen".