84830857 has 4 divisors (see below), whose sum is σ = 84849280. Its totient is φ = 84812436.

The previous prime is 84830843. The next prime is 84830909. The reversal of 84830857 is 75803848.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84830857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84830257) 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, 4444 + ... + 13762.

It is an arithmetic number, because the mean of its divisors is an integer number (21212320).

Almost surely, 2^84830857 is an apocalyptic number.

It is an amenable number.

84830857 is a deficient number, since it is larger than the sum of its proper divisors (18423).

84830857 is an equidigital number, since it uses as much as digits as its factorization.

84830857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18422.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 84830857 is about 9210.3668222281. The cubic root of 84830857 is about 439.3911292538.

The spelling of 84830857 in words is "eighty-four million, eight hundred thirty thousand, eight hundred fifty-seven".