84788289 has 12 divisors (see below), whose sum is σ = 127008336. Its totient is φ = 56525364.

The previous prime is 84788267. The next prime is 84788293. The reversal of 84788289 is 98288748.

It is not a de Polignac number, because 84788289 - 2¹⁹ = 84264001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84788239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174219 + ... + 174704.

It is an arithmetic number, because the mean of its divisors is an integer number (10584028).

Almost surely, 2^84788289 is an apocalyptic number.

It is an amenable number.

84788289 is a deficient number, since it is larger than the sum of its proper divisors (42220047).

84788289 is an equidigital number, since it uses as much as digits as its factorization.

84788289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348938 (or 348926 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 84788289 is about 9208.0556579552. The cubic root of 84788289 is about 439.3176216817.

The spelling of 84788289 in words is "eighty-four million, seven hundred eighty-eight thousand, two hundred eighty-nine".