135373213 has 8 divisors (see below), whose sum is σ = 137809880. Its totient is φ = 132943680.

The previous prime is 135373181. The next prime is 135373241. The reversal of 135373213 is 312373531.

It can be written as a sum of positive squares in 4 ways, for example, as 5116644 + 130256569 = 2262^2 + 11413^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135373213 - 2⁵ = 135373181 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 (135373253) 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 7 ways as a sum of consecutive naturals, for example, 49231 + ... + 51907.

It is an arithmetic number, because the mean of its divisors is an integer number (17226235).

Almost surely, 2^135373213 is an apocalyptic number.

It is an amenable number.

135373213 is a deficient number, since it is larger than the sum of its proper divisors (2436667).

135373213 is an equidigital number, since it uses as much as digits as its factorization.

135373213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567.

The product of its digits is 5670, while the sum is 28.

The square root of 135373213 is about 11634.9994843146. Note that the first 3 decimals coincide. The cubic root of 135373213 is about 513.4650788609.

The spelling of 135373213 in words is "one hundred thirty-five million, three hundred seventy-three thousand, two hundred thirteen".