135266393 has 4 divisors (see below), whose sum is σ = 135698868. Its totient is φ = 134833920.

The previous prime is 135266389. The next prime is 135266429. The reversal of 135266393 is 393662531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 393662531 = 1093 ⋅360167.

It can be written as a sum of positive squares in 2 ways, for example, as 61512649 + 73753744 = 7843^2 + 8588^2 .

It is a cyclic number.

It is not a de Polignac number, because 135266393 - 2² = 135266389 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135266323) 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, 215768 + ... + 216393.

It is an arithmetic number, because the mean of its divisors is an integer number (33924717).

Almost surely, 2^135266393 is an apocalyptic number.

It is an amenable number.

135266393 is a deficient number, since it is larger than the sum of its proper divisors (432475).

135266393 is an equidigital number, since it uses as much as digits as its factorization.

135266393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432474.

The product of its digits is 87480, while the sum is 38.

The square root of 135266393 is about 11630.4081183766. The cubic root of 135266393 is about 513.3299886872.

The spelling of 135266393 in words is "one hundred thirty-five million, two hundred sixty-six thousand, three hundred ninety-three".