135860986 has 4 divisors (see below), whose sum is σ = 203791482. Its totient is φ = 67930492.

The previous prime is 135860981. The next prime is 135861071. The reversal of 135860986 is 689068531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689068531 = 17 ⋅40533443.

It can be written as a sum of positive squares in only one way, i.e., 111703761 + 24157225 = 10569^2 + 4915^2 .

It is not an unprimeable number, because it can be changed into a prime (135860981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33965245 + ... + 33965248.

Almost surely, 2^135860986 is an apocalyptic number.

135860986 is a deficient number, since it is larger than the sum of its proper divisors (67930496).

135860986 is an equidigital number, since it uses as much as digits as its factorization.

135860986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67930495.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 135860986 is about 11655.9420897669. The cubic root of 135860986 is about 514.0810406822.

The spelling of 135860986 in words is "one hundred thirty-five million, eight hundred sixty thousand, nine hundred eighty-six".