135870986 has 8 divisors (see below), whose sum is σ = 204412260. Its totient is φ = 67733568.

The previous prime is 135870961. The next prime is 135870989. The reversal of 135870986 is 689078531.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 132963961 + 2907025 = 11531^2 + 1705^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×135870986² = 36921849673224392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 135870986.

It is not an unprimeable number, because it can be changed into a prime (135870989) 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, 100121 + ... + 101468.

Almost surely, 2^135870986 is an apocalyptic number.

135870986 is a deficient number, since it is larger than the sum of its proper divisors (68541274).

135870986 is a wasteful number, since it uses less digits than its factorization.

135870986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201928.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 135870986 is about 11656.3710476288. The cubic root of 135870986 is about 514.0936532907.

The spelling of 135870986 in words is "one hundred thirty-five million, eight hundred seventy thousand, nine hundred eighty-six".