84258891 has 24 divisors (see below), whose sum is σ = 126360000. Its totient is φ = 54039552.

The previous prime is 84258877. The next prime is 84258893. The reversal of 84258891 is 19885248.

It is a happy number.

It is not a de Polignac number, because 84258891 - 2⁵ = 84258859 is a prime.

It is a super-3 number, since 3×84258891³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (84258893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116830 + ... + 117548.

It is an arithmetic number, because the mean of its divisors is an integer number (5265000).

Almost surely, 2^84258891 is an apocalyptic number.

84258891 is a deficient number, since it is larger than the sum of its proper divisors (42101109).

84258891 is a wasteful number, since it uses less digits than its factorization.

84258891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203 (or 1200 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 84258891 is about 9179.2641861971. The cubic root of 84258891 is about 438.4013803608.

The spelling of 84258891 in words is "eighty-four million, two hundred fifty-eight thousand, eight hundred ninety-one".