135809722 has 4 divisors (see below), whose sum is σ = 203714586. Its totient is φ = 67904860.

The previous prime is 135809699. The next prime is 135809747. The reversal of 135809722 is 227908531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 227908531 = 199 ⋅1145269.

It can be written as a sum of positive squares in only one way, i.e., 135233641 + 576081 = 11629^2 + 759^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 33952429 + ... + 33952432.

Almost surely, 2^135809722 is an apocalyptic number.

135809722 is a deficient number, since it is larger than the sum of its proper divisors (67904864).

135809722 is an equidigital number, since it uses as much as digits as its factorization.

135809722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67904863.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 135809722 is about 11653.7428322406. The cubic root of 135809722 is about 514.0163736854.

The spelling of 135809722 in words is "one hundred thirty-five million, eight hundred nine thousand, seven hundred twenty-two".