84878619 has 16 divisors (see below), whose sum is σ = 129850368. Its totient is φ = 48310272.

The previous prime is 84878611. The next prime is 84878653. The reversal of 84878619 is 91687848.

It is not a de Polignac number, because 84878619 - 2³ = 84878611 is a prime.

It is a super-2 number, since 2×84878619² = 14408759926694322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84878611) 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 15 ways as a sum of consecutive naturals, for example, 2467 + ... + 13260.

It is an arithmetic number, because the mean of its divisors is an integer number (8115648).

Almost surely, 2^84878619 is an apocalyptic number.

84878619 is a deficient number, since it is larger than the sum of its proper divisors (44971749).

84878619 is a wasteful number, since it uses less digits than its factorization.

84878619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15994.

The product of its digits is 774144, while the sum is 51.

The square root of 84878619 is about 9212.9592965561. The cubic root of 84878619 is about 439.4735766968.

The spelling of 84878619 in words is "eighty-four million, eight hundred seventy-eight thousand, six hundred nineteen".