84785643 has 8 divisors (see below), whose sum is σ = 125608400. Its totient is φ = 56523744.

The previous prime is 84785639. The next prime is 84785653. The reversal of 84785643 is 34658748.

84785643 is a `hidden beast` number, since 84 + 7 + 8 + 564 + 3 = 666.

It is not a de Polignac number, because 84785643 - 2² = 84785639 is a prime.

It is a super-3 number, since 3×84785643³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84785653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1570078 + ... + 1570131.

It is an arithmetic number, because the mean of its divisors is an integer number (15701050).

Almost surely, 2^84785643 is an apocalyptic number.

84785643 is a deficient number, since it is larger than the sum of its proper divisors (40822757).

84785643 is a wasteful number, since it uses less digits than its factorization.

84785643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140218 (or 3140212 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 84785643 is about 9207.9119782935. The cubic root of 84785643 is about 439.3130516853.

The spelling of 84785643 in words is "eighty-four million, seven hundred eighty-five thousand, six hundred forty-three".