135839866 has 4 divisors (see below), whose sum is σ = 203759802. Its totient is φ = 67919932.

The previous prime is 135839831. The next prime is 135839903. The reversal of 135839866 is 668938531.

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

It can be written as a sum of positive squares in only one way, i.e., 135839025 + 841 = 11655^2 + 29^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33959965 + ... + 33959968.

Almost surely, 2^135839866 is an apocalyptic number.

135839866 is a deficient number, since it is larger than the sum of its proper divisors (67919936).

135839866 is an equidigital number, since it uses as much as digits as its factorization.

135839866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67919935.

The product of its digits is 933120, while the sum is 49.

The square root of 135839866 is about 11655.0360788802. The cubic root of 135839866 is about 514.0544008190.

The spelling of 135839866 in words is "one hundred thirty-five million, eight hundred thirty-nine thousand, eight hundred sixty-six".