84789477 has 16 divisors (see below), whose sum is σ = 131076480. Its totient is φ = 54068256.

The previous prime is 84789469. The next prime is 84789487. The reversal of 84789477 is 77498748.

It is not a de Polignac number, because 84789477 - 2³ = 84789469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84789487) 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, 67648 + ... + 68889.

It is an arithmetic number, because the mean of its divisors is an integer number (8192280).

Almost surely, 2^84789477 is an apocalyptic number.

It is an amenable number.

84789477 is a deficient number, since it is larger than the sum of its proper divisors (46287003).

84789477 is a wasteful number, since it uses less digits than its factorization.

84789477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136569 (or 136563 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 84789477 is about 9208.1201664618. The cubic root of 84789477 is about 439.3196734859.

It can be divided in two parts, 8478 and 9477, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 84789477 in words is "eighty-four million, seven hundred eighty-nine thousand, four hundred seventy-seven".