135860999 has 4 divisors (see below), whose sum is σ = 136565136. Its totient is φ = 135156864.

The previous prime is 135860981. The next prime is 135861071. The reversal of 135860999 is 999068531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135860999 is a prime.

It is a super-3 number, since 3×135860999³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135860909) 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, 351779 + ... + 352164.

It is an arithmetic number, because the mean of its divisors is an integer number (34141284).

Almost surely, 2^135860999 is an apocalyptic number.

135860999 is a deficient number, since it is larger than the sum of its proper divisors (704137).

135860999 is an equidigital number, since it uses as much as digits as its factorization.

135860999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704136.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 135860999 is about 11655.9426474224. The cubic root of 135860999 is about 514.0810570790.

The spelling of 135860999 in words is "one hundred thirty-five million, eight hundred sixty thousand, nine hundred ninety-nine".