135979273 has 4 divisors (see below), whose sum is σ = 137507220. Its totient is φ = 134451328.

The previous prime is 135979267. The next prime is 135979297. The reversal of 135979273 is 372979531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19598329 + 116380944 = 4427^2 + 10788^2 .

It is a cyclic number.

It is not a de Polignac number, because 135979273 - 2⁵ = 135979241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135979223) 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, 763840 + ... + 764017.

It is an arithmetic number, because the mean of its divisors is an integer number (34376805).

Almost surely, 2^135979273 is an apocalyptic number.

It is an amenable number.

135979273 is a deficient number, since it is larger than the sum of its proper divisors (1527947).

135979273 is an equidigital number, since it uses as much as digits as its factorization.

135979273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527946.

The product of its digits is 357210, while the sum is 46.

The square root of 135979273 is about 11661.0150930354. The cubic root of 135979273 is about 514.2301918271.

The spelling of 135979273 in words is "one hundred thirty-five million, nine hundred seventy-nine thousand, two hundred seventy-three".