135897313 has 2 divisors, whose sum is σ = 135897314. Its totient is φ = 135897312.

The previous prime is 135897259. The next prime is 135897319. The reversal of 135897313 is 313798531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135885649 + 11664 = 11657^2 + 108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135897313 is a prime.

It is not a weakly prime, because it can be changed into another prime (135897319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67948656 + 67948657.

It is an arithmetic number, because the mean of its divisors is an integer number (67948657).

Almost surely, 2^135897313 is an apocalyptic number.

It is an amenable number.

135897313 is a deficient number, since it is larger than the sum of its proper divisors (1).

135897313 is an equidigital number, since it uses as much as digits as its factorization.

135897313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 135897313 is about 11657.5002895132. The cubic root of 135897313 is about 514.1268555461.

It can be divided in two parts, 13589 and 7313, that added together give a palindrome (20902).

The spelling of 135897313 in words is "one hundred thirty-five million, eight hundred ninety-seven thousand, three hundred thirteen".