84842891 has 8 divisors (see below), whose sum is σ = 97198080. Its totient is φ = 72546408.

The previous prime is 84842861. The next prime is 84842911. The reversal of 84842891 is 19824848.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 84842891 - 2¹⁸ = 84580747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84842861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11531 + ... + 17396.

It is an arithmetic number, because the mean of its divisors is an integer number (12149760).

Almost surely, 2^84842891 is an apocalyptic number.

84842891 is a deficient number, since it is larger than the sum of its proper divisors (12355189).

84842891 is a wasteful number, since it uses less digits than its factorization.

84842891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29353.

The product of its digits is 147456, while the sum is 44.

The square root of 84842891 is about 9211.0200846595. The cubic root of 84842891 is about 439.4119054313.

The spelling of 84842891 in words is "eighty-four million, eight hundred forty-two thousand, eight hundred ninety-one".