135311843 has 4 divisors (see below), whose sum is σ = 135448560. Its totient is φ = 135175128.

The previous prime is 135311819. The next prime is 135311873. The reversal of 135311843 is 348113531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 348113531 = 3583 ⋅97157.

It is a cyclic number.

It is not a de Polignac number, because 135311843 - 2¹² = 135307747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135311873) 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, 66863 + ... + 68856.

It is an arithmetic number, because the mean of its divisors is an integer number (33862140).

Almost surely, 2^135311843 is an apocalyptic number.

135311843 is a deficient number, since it is larger than the sum of its proper divisors (136717).

135311843 is an equidigital number, since it uses as much as digits as its factorization.

135311843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136716.

The product of its digits is 4320, while the sum is 29.

The square root of 135311843 is about 11632.3618839856. The cubic root of 135311843 is about 513.3874758301.

The spelling of 135311843 in words is "one hundred thirty-five million, three hundred eleven thousand, eight hundred forty-three".