84505857 has 8 divisors (see below), whose sum is σ = 112809984. Its totient is φ = 56269488.

The previous prime is 84505831. The next prime is 84505867. The reversal of 84505857 is 75850548.

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

It is not a de Polignac number, because 84505857 - 2⁸ = 84505601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84505867) 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, 13953 + ... + 19070.

It is an arithmetic number, because the mean of its divisors is an integer number (14101248).

Almost surely, 2^84505857 is an apocalyptic number.

It is an amenable number.

84505857 is a deficient number, since it is larger than the sum of its proper divisors (28304127).

84505857 is a wasteful number, since it uses less digits than its factorization.

84505857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33879.

The product of its (nonzero) digits is 224000, while the sum is 42.

The square root of 84505857 is about 9192.7067287062. The cubic root of 84505857 is about 438.8292862452.

The spelling of 84505857 in words is "eighty-four million, five hundred five thousand, eight hundred fifty-seven".