84234581 has 4 divisors (see below), whose sum is σ = 88668000. Its totient is φ = 79801164.

The previous prime is 84234551. The next prime is 84234593. The reversal of 84234581 is 18543248.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84234581 is a prime.

It is a super-2 number, since 2×84234581² = 14190929272491122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84234551) 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 3 ways as a sum of consecutive naturals, for example, 2216681 + ... + 2216718.

It is an arithmetic number, because the mean of its divisors is an integer number (22167000).

Almost surely, 2^84234581 is an apocalyptic number.

It is an amenable number.

84234581 is a deficient number, since it is larger than the sum of its proper divisors (4433419).

84234581 is a wasteful number, since it uses less digits than its factorization.

84234581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433418.

The product of its digits is 30720, while the sum is 35.

The square root of 84234581 is about 9177.9399104592. The cubic root of 84234581 is about 438.3592144340.

The spelling of 84234581 in words is "eighty-four million, two hundred thirty-four thousand, five hundred eighty-one".