84135887 has 8 divisors (see below), whose sum is σ = 92171520. Its totient is φ = 76164760.

The previous prime is 84135881. The next prime is 84135899. The reversal of 84135887 is 78853148.

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

It is a cyclic number.

It is not a de Polignac number, because 84135887 - 2⁶ = 84135823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84135881) 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, 13373 + ... + 18630.

It is an arithmetic number, because the mean of its divisors is an integer number (11521440).

Almost surely, 2^84135887 is an apocalyptic number.

84135887 is a deficient number, since it is larger than the sum of its proper divisors (8035633).

84135887 is a wasteful number, since it uses less digits than its factorization.

84135887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32253.

The product of its digits is 215040, while the sum is 44.

The square root of 84135887 is about 9172.5616378414. The cubic root of 84135887 is about 438.1879453763.

The spelling of 84135887 in words is "eighty-four million, one hundred thirty-five thousand, eight hundred eighty-seven".