135213473 has 4 divisors (see below), whose sum is σ = 135596868. Its totient is φ = 134830080.

The previous prime is 135213467. The next prime is 135213479. The reversal of 135213473 is 374312531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 374312531 = 61 ⋅6136271.

It is an interprime number because it is at equal distance from previous prime (135213467) and next prime (135213479).

It can be written as a sum of positive squares in 2 ways, for example, as 84419344 + 50794129 = 9188^2 + 7127^2 .

It is a cyclic number.

It is not a de Polignac number, because 135213473 - 2²⁴ = 118436257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135213479) 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, 191168 + ... + 191873.

It is an arithmetic number, because the mean of its divisors is an integer number (33899217).

Almost surely, 2^135213473 is an apocalyptic number.

It is an amenable number.

135213473 is a deficient number, since it is larger than the sum of its proper divisors (383395).

135213473 is an equidigital number, since it uses as much as digits as its factorization.

135213473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383394.

The product of its digits is 7560, while the sum is 29.

The square root of 135213473 is about 11628.1328251788. The cubic root of 135213473 is about 513.2630369342.

The spelling of 135213473 in words is "one hundred thirty-five million, two hundred thirteen thousand, four hundred seventy-three".