84215289 has 8 divisors (see below), whose sum is σ = 112621600. Its totient is φ = 55976256.

The previous prime is 84215249. The next prime is 84215291. The reversal of 84215289 is 98251248.

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

It is not a de Polignac number, because 84215289 - 2⁹ = 84214777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84215249) 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, 40639 + ... + 42660.

It is an arithmetic number, because the mean of its divisors is an integer number (14077700).

Almost surely, 2^84215289 is an apocalyptic number.

It is an amenable number.

84215289 is a deficient number, since it is larger than the sum of its proper divisors (28406311).

84215289 is a wasteful number, since it uses less digits than its factorization.

84215289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83639.

The product of its digits is 46080, while the sum is 39.

The square root of 84215289 is about 9176.8888518931. Note that the first 4 decimals coincide. The cubic root of 84215289 is about 438.3257465021.

The spelling of 84215289 in words is "eighty-four million, two hundred fifteen thousand, two hundred eighty-nine".