84788019 has 8 divisors (see below), whose sum is σ = 125611920. Its totient is φ = 56525328.

The previous prime is 84788017. The next prime is 84788023. The reversal of 84788019 is 91088748.

It is not a de Polignac number, because 84788019 - 2¹ = 84788017 is a prime.

It is a super-2 number, since 2×84788019² = 14378016331888722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84788017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1570122 + ... + 1570175.

It is an arithmetic number, because the mean of its divisors is an integer number (15701490).

Almost surely, 2^84788019 is an apocalyptic number.

84788019 is a deficient number, since it is larger than the sum of its proper divisors (40823901).

84788019 is a wasteful number, since it uses less digits than its factorization.

84788019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140306 (or 3140300 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 84788019 is about 9208.0409968679. The cubic root of 84788019 is about 439.3171553599.

The spelling of 84788019 in words is "eighty-four million, seven hundred eighty-eight thousand, nineteen".