84310891 has 4 divisors (see below), whose sum is σ = 96355312. Its totient is φ = 72266472.

The previous prime is 84310879. The next prime is 84310913. The reversal of 84310891 is 19801348.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84310891 - 2⁷ = 84310763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84310591) 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, 6022200 + ... + 6022213.

It is an arithmetic number, because the mean of its divisors is an integer number (24088828).

Almost surely, 2^84310891 is an apocalyptic number.

84310891 is a deficient number, since it is larger than the sum of its proper divisors (12044421).

84310891 is a wasteful number, since it uses less digits than its factorization.

84310891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12044420.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 84310891 is about 9182.0962203628. The cubic root of 84310891 is about 438.4915476355.

The spelling of 84310891 in words is "eighty-four million, three hundred ten thousand, eight hundred ninety-one".