135871863 has 8 divisors (see below), whose sum is σ = 183456000. Its totient is φ = 89434488.

The previous prime is 135871847. The next prime is 135871889. The reversal of 135871863 is 368178531.

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

It is not a de Polignac number, because 135871863 - 2⁴ = 135871847 is a prime.

It is a super-2 number, since 2×135871863² = 36922326310181538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135871823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286413 + ... + 286886.

It is an arithmetic number, because the mean of its divisors is an integer number (22932000).

Almost surely, 2^135871863 is an apocalyptic number.

135871863 is a deficient number, since it is larger than the sum of its proper divisors (47584137).

135871863 is an equidigital number, since it uses as much as digits as its factorization.

135871863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573381.

The product of its digits is 120960, while the sum is 42.

The square root of 135871863 is about 11656.4086664804. The cubic root of 135871863 is about 514.0947593870.

The spelling of 135871863 in words is "one hundred thirty-five million, eight hundred seventy-one thousand, eight hundred sixty-three".