135857263 has 4 divisors (see below), whose sum is σ = 136337608. Its totient is φ = 135376920.

The previous prime is 135857261. The next prime is 135857269. The reversal of 135857263 is 362758531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362758531 = 9277 ⋅39103.

It is a cyclic number.

It is not a de Polignac number, because 135857263 - 2¹ = 135857261 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 (135857261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239748 + ... + 240313.

It is an arithmetic number, because the mean of its divisors is an integer number (34084402).

Almost surely, 2^135857263 is an apocalyptic number.

135857263 is a deficient number, since it is larger than the sum of its proper divisors (480345).

135857263 is an equidigital number, since it uses as much as digits as its factorization.

135857263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480344.

The product of its digits is 151200, while the sum is 40.

The square root of 135857263 is about 11655.7823847222. The cubic root of 135857263 is about 514.0763448500.

The spelling of 135857263 in words is "one hundred thirty-five million, eight hundred fifty-seven thousand, two hundred sixty-three".