84689785 has 8 divisors (see below), whose sum is σ = 101931336. Its totient is φ = 67549440.

The previous prime is 84689779. The next prime is 84689807. The reversal of 84689785 is 58798648.

It can be written as a sum of positive squares in 4 ways, for example, as 104976 + 84584809 = 324^2 + 9197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-84689785 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23446 + ... + 26815.

It is an arithmetic number, because the mean of its divisors is an integer number (12741417).

Almost surely, 2^84689785 is an apocalyptic number.

It is an amenable number.

84689785 is a deficient number, since it is larger than the sum of its proper divisors (17241551).

84689785 is a wasteful number, since it uses less digits than its factorization.

84689785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50603.

The product of its digits is 3870720, while the sum is 55.

The square root of 84689785 is about 9202.7053087665. The cubic root of 84689785 is about 439.1474279257.

The spelling of 84689785 in words is "eighty-four million, six hundred eighty-nine thousand, seven hundred eighty-five".