84720887 has 8 divisors (see below), whose sum is σ = 86287632. Its totient is φ = 83160000.

The previous prime is 84720869. The next prime is 84720913. The reversal of 84720887 is 78802748.

It is a happy number.

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 84720887 - 2²⁴ = 67943671 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 (84720817) 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, 36512 + ... + 38762.

It is an arithmetic number, because the mean of its divisors is an integer number (10785954).

Almost surely, 2^84720887 is an apocalyptic number.

84720887 is a deficient number, since it is larger than the sum of its proper divisors (1566745).

84720887 is a wasteful number, since it uses less digits than its factorization.

84720887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2929.

The product of its (nonzero) digits is 200704, while the sum is 44.

The square root of 84720887 is about 9204.3949828329. The cubic root of 84720887 is about 439.2011797513.

The spelling of 84720887 in words is "eighty-four million, seven hundred twenty thousand, eight hundred eighty-seven".