135817393 has 2 divisors, whose sum is σ = 135817394. Its totient is φ = 135817392.

The previous prime is 135817387. The next prime is 135817397. The reversal of 135817393 is 393718531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110082064 + 25735329 = 10492^2 + 5073^2 .

It is a cyclic number.

It is not a de Polignac number, because 135817393 - 2⁹ = 135816881 is a prime.

It is not a weakly prime, because it can be changed into another prime (135817397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67908696 + 67908697.

It is an arithmetic number, because the mean of its divisors is an integer number (67908697).

Almost surely, 2^135817393 is an apocalyptic number.

It is an amenable number.

135817393 is a deficient number, since it is larger than the sum of its proper divisors (1).

135817393 is an equidigital number, since it uses as much as digits as its factorization.

135817393 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 135817393 is about 11654.0719493231. The cubic root of 135817393 is about 514.0260513072.

The spelling of 135817393 in words is "one hundred thirty-five million, eight hundred seventeen thousand, three hundred ninety-three".