84685917 has 4 divisors (see below), whose sum is σ = 112914560. Its totient is φ = 56457276.

The previous prime is 84685901. The next prime is 84685919. The reversal of 84685917 is 71958648.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 84685917 - 2⁴ = 84685901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84685919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14114317 + ... + 14114322.

It is an arithmetic number, because the mean of its divisors is an integer number (28228640).

Almost surely, 2^84685917 is an apocalyptic number.

It is an amenable number.

84685917 is a deficient number, since it is larger than the sum of its proper divisors (28228643).

84685917 is a wasteful number, since it uses less digits than its factorization.

84685917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28228642.

The product of its digits is 483840, while the sum is 48.

The square root of 84685917 is about 9202.4951507730. The cubic root of 84685917 is about 439.1407421603.

The spelling of 84685917 in words is "eighty-four million, six hundred eighty-five thousand, nine hundred seventeen".