84678783 has 16 divisors (see below), whose sum is σ = 130487040. Its totient is φ = 47843136.

The previous prime is 84678749. The next prime is 84678823. The reversal of 84678783 is 38787648.

It is not a de Polignac number, because 84678783 - 2⁶ = 84678719 is a prime.

It is a super-2 number, since 2×84678783² = 14340992580722178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84678733) 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, 20785 + ... + 24522.

It is an arithmetic number, because the mean of its divisors is an integer number (8155440).

Almost surely, 2^84678783 is an apocalyptic number.

84678783 is a deficient number, since it is larger than the sum of its proper divisors (45808257).

84678783 is a wasteful number, since it uses less digits than its factorization.

84678783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45406.

The product of its digits is 1806336, while the sum is 51.

The square root of 84678783 is about 9202.1075303433. The cubic root of 84678783 is about 439.1284106411.

The spelling of 84678783 in words is "eighty-four million, six hundred seventy-eight thousand, seven hundred eighty-three".