85684557 has 8 divisors (see below), whose sum is σ = 130566976. Its totient is φ = 48962592.

The previous prime is 85684523. The next prime is 85684561. The reversal of 85684557 is 75548658.

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

It is not a de Polignac number, because 85684557 - 2⁶ = 85684493 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 (85684507) 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, 2040088 + ... + 2040129.

It is an arithmetic number, because the mean of its divisors is an integer number (16320872).

Almost surely, 2^85684557 is an apocalyptic number.

It is an amenable number.

85684557 is a deficient number, since it is larger than the sum of its proper divisors (44882419).

85684557 is a wasteful number, since it uses less digits than its factorization.

85684557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080227.

The product of its digits is 1344000, while the sum is 48.

The square root of 85684557 is about 9256.5953244160. The cubic root of 85684557 is about 440.8601579424.

The spelling of 85684557 in words is "eighty-five million, six hundred eighty-four thousand, five hundred fifty-seven".