135721882 has 4 divisors (see below), whose sum is σ = 203582826. Its totient is φ = 67860940.

The previous prime is 135721879. The next prime is 135721907. The reversal of 135721882 is 288127531.

135721882 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 288127531 = 47 ⋅6130373.

It can be written as a sum of positive squares in only one way, i.e., 124970041 + 10751841 = 11179^2 + 3279^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33930469 + ... + 33930472.

Almost surely, 2^135721882 is an apocalyptic number.

135721882 is a deficient number, since it is larger than the sum of its proper divisors (67860944).

135721882 is an equidigital number, since it uses as much as digits as its factorization.

135721882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67860943.

The product of its digits is 26880, while the sum is 37.

The square root of 135721882 is about 11649.9734763647. The cubic root of 135721882 is about 513.9055300347.

The spelling of 135721882 in words is "one hundred thirty-five million, seven hundred twenty-one thousand, eight hundred eighty-two".