84623861 has 8 divisors (see below), whose sum is σ = 97254720. Its totient is φ = 72128448.

The previous prime is 84623857. The next prime is 84623933. The reversal of 84623861 is 16832648.

It is a happy number.

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

It is not a de Polignac number, because 84623861 - 2² = 84623857 is a prime.

It is a super-2 number, since 2×84623861² = 14322395701094642, 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 (84623801) 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, 32516 + ... + 35021.

It is an arithmetic number, because the mean of its divisors is an integer number (12156840).

Almost surely, 2^84623861 is an apocalyptic number.

It is an amenable number.

84623861 is a deficient number, since it is larger than the sum of its proper divisors (12630859).

84623861 is a wasteful number, since it uses less digits than its factorization.

84623861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67723.

The product of its digits is 55296, while the sum is 38.

The square root of 84623861 is about 9199.1228386189. The cubic root of 84623861 is about 439.0334516844.

The spelling of 84623861 in words is "eighty-four million, six hundred twenty-three thousand, eight hundred sixty-one".